publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2018-01-04 | Tunable magnetic and transport properties of Mn3Ga thin films on Ta/Ru seedlayer | Hexagonal D019-type Mn3Z alloys that possess large anomalous and
topological-like Hall effects have attracted much attention due to their great
potential in the antiferromagnetic spintronic devices. Here, we report the
preparation of Mn3Ga film in both tetragonal and hexagonal phases with a tuned
Ta/Ru seed layer on th... | 1801.01233v1 |
2018-01-10 | Electronic band structure engineering in InAs/InSbAs and InSb/InSbAs superlattice heterostructures | We report a detailed ab initio study of two superlattice heterostructures,
one component of which is a unit cell of CuPt ordered InSb_(0.5)As_(0.5). This
alloy part of the heterostructures is a topological semimetal. The other
component of each system is a semiconductor, zincblende-InSb, and
wurtzite-InAs. Both heteros... | 1801.03392v2 |
2017-12-02 | On performance of nano-resonators produced by magnetron sputtering deposition | Magnetron sputtering is a perfect technique for processing nanomaterials for
engineering and medical applications. A material can be processed with specific
mechanical properties, microstructure, and surface texture by controlling the
parameters of magnetron sputtering. Therefore, studies should be conducted on
investi... | 1801.06529v1 |
2018-01-25 | Overdriven dislocation-precipitate interactions at elevated temperatures in aluminum | The two-dimensional dislocation dynamics approach has been recently used for
analyzing plastic deformation in metals and alloys at elevated temperatures.
The two-dimensional approach, however, only accounts for the dislocation
climbing process, and it assumes that dislocation bypassing and shearing of
precipitates are ... | 1801.08623v1 |
2018-01-30 | EMME: a formal tool for ECMAScript Memory Model Evaluation | Nearly all web-based interfaces are written in JavaScript. Given its
prevalence, the support for high performance JavaScript code is crucial. The
ECMA Technical Committee 39 (TC39) has recently extended the ECMAScript
language (i.e., JavaScript) to support shared memory accesses between different
threads. The extension... | 1801.10140v2 |
2018-03-01 | Characterisation of slip and twinning in high rate deformed zirconium with electron backscatter diffraction | Zirconium alloys are used in the nuclear industry as structural materials,
and can be subject to high strain rate loading conditions during forming and in
the case of a reactor accident. In this context, the relationship between
strain rate dependent mechanical properties, crystallographic texture and
deformation modes... | 1803.00236v1 |
2018-03-07 | Ultra-Fast Ferrimagnetic All Spin Logic Device | All spin logic device (ASLD) blazes an alternative path for realizing
ultra-low power computing in the Post-Moore era. However, initial device
structure relying on ferromagnetic input/output and spin transfer torque (STT)
driven magnetization switching degrades its performance and even hinders its
realization. In this ... | 1803.02552v1 |
2018-03-08 | Atomic motion in solids with dimpled potentials | Polymorphic solids of the same chemical composition can have different atomic
structures; in each polymorph atoms vibrate around a local potential energy
minimum (LPEM). If transformations to other structures have sufficiently high
enthalpy barriers, then each polymorph is either stable or metastable; it is
stationary ... | 1803.03286v1 |
2018-03-09 | Fundamental and Progress of Bi2Te3-based Thermoelectric Materials | Thermoelectric materials, enabling the directing conversion between heat and
electricity, are one of the promising candidates for overcoming environmental
pollution and the upcoming energy shortage caused by the over-consumption of
fossil fuels. Bi2Te3-based alloys are the classical thermoelectric materials
working nea... | 1803.03386v1 |
2018-03-10 | Statistical mechanics of high-density bond percolation | High-density (HD) percolation describes the percolation over specific
$\kappa$ -clusters, which are the compact sets of sites each connected to
$\kappa$ nearest filled sites at least. It takes place in the classical
patterns of independently distributed sites or bonds in which the ordinary
percolation transition also e... | 1803.03785v2 |
2018-03-15 | Low Temperature Ageing Behaviour of U-Nb $α''$ Phase Alloys | Ageing mechanisms of the U-5\,\%wtNb system have been investigated on samples
exposed to temperatures of 150$\,^{\circ}$C for up to 5000\,hours. A variety of
surface and bulk analytic techniques have been used to investigate phase,
chemical and crystallographic changes. Characterisation of microstructural
evolution was... | 1803.05709v1 |
2018-03-19 | High temperature magnetism and microstructure of semiconducting ferromagnetic alloy (GaSb)$_{1-x}$(MnSb)$_{x}$ | We have studied the properties of relatively thick (about 120 nm) magnetic
composite films grown by pulsed laser deposition method using
(GaSb)$_{0.59}$(MnSb)$_{0.41}$ eutectic compound as a target for sputtering.
For the studied films we have observed ferromagnetism and anomalous Hall effect
above the room temperature... | 1803.06769v1 |
2018-03-20 | Ordered array of $ω$ particles in $β$-Ti matrix studied by small-angle X-ray scattering | Nanosized particles of $\omega$ phase in a $\beta$-Ti alloy were investigated
by small-angle X-ray scattering using synchrotron radiation. We demonstrated
that the particles are spontaneously weakly ordered in a three-dimensional
cubic array along the $\langle 100\rangle$-directions in the $\beta$-Ti matrix.
The small-... | 1803.07403v1 |
2018-05-01 | Al$_x$Ga$_{1-x}$As crystals with direct 2 eV band gaps from computational alchemy | We use alchemical first order derivatives for the rapid yet robust prediction
of band structures. The power of the approach is demonstrated for the design
challenge of finding Al$_x$Ga$_{1-x}$As semiconductor alloys with large direct
band gap using computational alchemy within a genetic algorithm. Dozens of
crystal pol... | 1805.00299v3 |
2018-05-07 | Highly efficient spin current generation by the spin Hall effect in Au$_{1-x}$Pt$_x$ | We report very efficient spin current generation by the spin Hall effect in
the alloy Au0.25Pt0.75, which, as determined by two different direct spin-orbit
torque measurements, exhibits a giant internal spin Hall ratio of > 0.58
(anti-damping spin-orbit torque efficiency of ~ 0.35 in bilayers with Co), a
relatively low... | 1805.02329v3 |
2018-05-08 | Spin-Hall and Anisotropic Magnetoresistance in Ferrimagnetic Co-Gd / Pt layers | We present the Co-Gd composition dependence of the spin-Hall
magnetoresistance (SMR) and anisotropic magnetoresistance (AMR) for
ferrimagnetic Co100-xGdx / Pt bilayers. With Gd concentration x, its magnetic
moment increasingly competes with the Co moment in the net magnetization. We
find a nearly compensated ferrimagne... | 1805.02827v2 |
2018-05-09 | Spatial Poisson processes for fatigue crack initiation | In this work we propose a stochastic model for estimating the occurrence of
crack initiations on the surface of metallic specimens in fatigue problems that
can be applied to a general class of geometries. The stochastic model is based
on spatial Poisson processes with intensity function that combines stress-life
(S-N) ... | 1805.03433v2 |
2018-05-10 | Maximizing Specific Loss Power for Magnetic Hyperthermia by Hard-Soft Mixed Ferrites | We report maximized specific loss power and intrinsic loss power approaching
theoretical limits for AC magnetic field heating of nanoparticles. This is
achieved by engineering the effective magnetic anisotropy barrier of
nanoparticles via alloying of hard and soft ferrites. 22 nm
Co0.03Mn0.28Fe2.7O4/SiO2 NPs reached a ... | 1805.04204v1 |
2018-05-23 | Evidence of nanoscale Anderson localization induced by intrinsic compositional disorder in InGaN/GaN quantum wells by scanning tunneling luminescence spectroscopy | We present direct experimental evidences of Anderson localization induced by
the intrinsic alloy compositional disorder of InGaN/GaN quantum wells. Our
approach relies on the measurement of the luminescence spectrum under local
injection of electrons from a scanning tunneling microscope tip into a
near-surface single q... | 1805.09030v1 |
2018-05-29 | Gilbert damping in non-collinear magnetic system | The modification of the magnetization dissipation or Gilbert damping caused
by an inhomogeneous magnetic structure and expressed in terms of a wave vector
dependent tensor $\underline{\alpha}(\vec{q})$ is investigated by means of
linear response theory. A corresponding expression for
$\underline{\alpha}(\vec{q})$ in te... | 1805.11468v1 |
2018-05-30 | Does Stochastic Disorder Conform to Configurational Disorder? | In alloy thermodynamics, stochastically disordered state (SDS), where each
lattice point is stochastically occupied by constituents according to given
composition, is typically referred to investigating physical properties for
homogeneously substitutional state: The so-called special quasirandom structure
(SQS) of a si... | 1805.12046v2 |
2018-06-04 | Strong Resonances of Quasi 1D Structures at the Bi/InAs(100) Surface | Thin Bi films are interesting candidates for spintronic applications due to a
large spin-orbit splitting that, combined with the loss of inversion symmetry
at the surface, results in a band structure that is not spin-degenerate. In
recent years, applications for topological insulators based on Bi and Bi alloys
have as ... | 1806.01031v2 |
2018-06-04 | Current-induced domain wall motion in compensated ferrimagnet | Due to the difficulty in detecting and manipulating magnetic states of
antiferromagnetic materials, studying their switching dynamics using electrical
methods remains a challenging task. In this work, by employing heavy metal/rare
earth-transition metal alloy bilayers, we experimentally studied
current-induced domain w... | 1806.01167v1 |
2018-06-05 | Efficient technique for ab-initio calculation of magnetocrystalline anisotropy energy | Ab-initio calculation of magnetocrystalline anisotropy energy (MCAE) often
requires a strict convergence criterion and a dense k-point mesh to sample the
Brillouin zone, making its convergence problematic and time-consuming. The
force theorem for MCAE states that MCAE can be calculated by the band energy
difference bet... | 1806.01536v2 |
2018-06-07 | Terahertz Emission from Compensated Magnetic Heterostructures | Terahertz emission spectroscopy (TES) has recently played an important role
in unveiling the spin dynamics at a terahertz (THz) frequency range. So far,
ferromagnetic (FM)/nonmagnetic (NM) heterostructures have been intensively
studied as THz sources. Compensated magnets such as a ferrimagnet (FIM) and
antiferromagnet ... | 1806.02517v1 |
2018-06-07 | Diagonal flipping of a Rhombus as elementary act of a polymorphic transformation. Calculation of energy threshold for the transformation in metals | Diagonal flipping of a rhombus consisting of two triangles sharing a common
edge with atoms (ions) in vertices of the triangles is considered as an
elementary act of the polymorphic transformation in metals. The estimation of
the energy threshold for the diagonal flipping has been carried out for various
combination of... | 1806.02601v1 |
2018-06-08 | Parameter free quantitative analysis of atom probe data by correlation functions: Application to the precipitation in Al-Zn-Mg-Cu | Atom probe tomography enables precise quantification of the composition of
second phase particles from their early stages, leading to improved
understanding of the thermodynamic and kinetic mechanisms of phase formation
and quantify structure-property relationships. Here we demonstrate how
approaches developed for smal... | 1806.03141v1 |
2018-06-11 | Hadron-quark phase transition: the QCD phase diagram and stellar conversion | Different extensions of the Nambu-Jona-Lasinio model, known to satisfy
expected QCD chiral symmetry aspects, are used to investigate a possible
hadron-quark phase transition at zero temperature and to build the
corresponding binodal sections. We have shown that the transition point is very
sensitive to the model parame... | 1806.04170v2 |
2018-06-12 | Complex magnetism and non-Fermi liquid state in the vicinity of the quantum critical point in the CeCo$_{1-x}$Fe$_x$Ge$_3$ series | We report extensive studies on the CeCo$_{1-x}$Fe$_{x}$Ge$_3$ alloys, which
show quantum critical point (QCP) due to damping the antiferromagnetic order in
CeCoGe$_3$ down to 0 K by doping with the paramagnetic CeFeGe$_3$ compound. The
presence of QCP is confirmed by detecting the non-Fermi liquid behavior (NFL)
using ... | 1806.04656v1 |
2018-06-13 | Low magnetic damping of ferrimagnetic GdFeCo alloys | We investigate the Gilbert damping parameter for rare earth (RE)-transition
metal (TM) ferrimagnets over a wide temperature range. Extracted from the
field-driven magnetic domain-wall mobility, the Gilbert damping parameter was
as low as 0.0072 and was almost constant across the angular momentum
compensation temperatur... | 1806.04881v1 |
2018-06-16 | High Performance Computing in Medical Image Analysis HuSSaR | In our former works we have made serious efforts to improve the performance
of medical image analysis methods with using ensemble-based systems. In this
paper, we present a novel hardware-based solution for the efficient adoption of
our complex, fusion-based approaches for real-time applications. Even though
most of th... | 1806.06171v1 |
2018-06-17 | Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)_2ClO_4 | This work presents and analyzes electrical resistivity data on the organic
superconductor (TMTSF)$_2$ClO$_4$ and their anion substituted alloys
(TMTSF)$_2$(ClO$_4$)$_{1-x}$(ReO$_4$)$_x$ along the least conducting $c^\star$
axis. Nonmagnetic disorder introduced by finite size domains of anion ordering
on non Fermi liqui... | 1806.06395v1 |
2018-06-20 | Magneto-optic Kerr effect in a spin-polarized zero-moment ferrimagnet | The magneto-optical Kerr effect (MOKE) is often assumed to be proportional to
the magnetisation of a magnetically ordered metallic sample; in metallic
ferrimagnets with chemically distinct sublattices, such as rare-earth
transition-metal alloys, it depends on the difference between the sublattice
contributions. Here we... | 1806.07719v2 |
2018-06-23 | Crack growth resistance in metallic alloys: the role of isotropic versus kinematic hardening | The sensitivity of crack growth resistance to the choice of isotropic or
kinematic hardening is investigated. Monotonic mode I crack advance under small
scale yielding conditions is modelled via a cohesive zone formulation endowed
with a traction-separation law. R-curves are computed for materials that
exhibit linear o... | 1806.08986v1 |
2018-06-25 | The stability and physical properties of the tetragonal phase of bulk CuMnAs antiferromagnet | The effect of Cu substitution on the stability of the CuMnAs tetragonal phase
was studied both experimentally and by ab initio calculations. Polycrystalline
samples with various compositions Cu$_{1+x}$Mn$_{1-x}$As $(x = 0 - 0.5)$ were
synthetized. The tetragonal phase of CuMnAs is found to be stabilized by
substituting... | 1806.09459v1 |
2018-06-25 | Mid-wave and Long-wave IR Linear Dichroism in a Hexagonal Perovskite Chalcogenide | Mid-wave infrared (IR) and long-wave IR spectral ranges are of growing
interest in various applications such as thermal imaging, thermography-based
remote sensing, and night vision. Materials widely used for IR photodetectors
in this regime include cadmium mercury telluride alloys and nanostructures of
compound semicon... | 1806.09688v1 |
2018-06-27 | Electronic properties of the ternary system YbPd$_2 $Ge$_{2-x}$ | The data on the electronic and magnetic properties of the ternary
ytterbium-based alloy YbPd$_2 $Ge$_{1.7}$ are presented and compared with those
for YbPd$_2 $Ge$_{2}$ and YbPd$_2 $Ge compounds. YbPd$_2 $Ge$_{1.7}$
demonstrates a moderate heavy-fermion behavior with linear specific heat
coefficient $\gamma \simeq $ 100... | 1806.10323v1 |
2018-09-10 | Quantification challenges for atom probe tomography of hydrogen and deuterium in Zircaloy-4 | Analysis and understanding of the role of hydrogen in metals is a significant
challenge for the future of materials science, and this is a clear objective of
recent work in the atom probe tomography (APT) community. Isotopic marking by
deuteration has often been proposed as the preferred route to enable
quantification ... | 1809.03556v2 |
2018-09-12 | Detection of hydrogen by the extraordinary Hall effect in CoPd alloys | Effect of hydrogen adsorption on the extraordinary Hall phenomenon (EHE) in
ferromagnetic CoPd films is studied as a function of composition, thickness,
substrate and hydrogen concentration in atmosphere. Adsorption of hydrogen adds
a positive term in the extraordinary Hall effect coefficient and modifies the
perpendic... | 1809.04515v1 |
2018-09-13 | Linear complexions: Metastable phase formation and coexistence at dislocations | The unique three-phase coexistence of metastable B2-FeNi with stable L10-FeNi
and L12-FeNi3 is discovered near edge dislocations in body-centered cubic Fe-Ni
alloys using atomistic simulations. Stable nanoscale precipitate arrays, formed
along the compression side of dislocation lines and defined as linear
complexions,... | 1809.05201v4 |
2018-09-17 | Electric-Field Control of Magnetic Order: From FeRh to Topological Antiferromagnetic Spintronics | Using an electric field instead of an electric current (or a magnetic field)
to tailor the electronic properties of magnetic materials is promising for
realizing ultralow energy-consuming memory devices because of the suppression
of Joule heating, especially when the devices are scaled to the nanoscale. In
the review, ... | 1809.06011v1 |
2018-08-25 | Mid-infrared GeSn Electro-Absorption Optical Modulators on Silicon | Mid-infrared silicon photonics has recently emerged as a new technology for a
wide range of applications such as optical communication, lidar, and
bio-sensing. One key component enabling this technology is the mid-infrared
optical modulator used for encoding optical signals. Here, we present a GeSn
electro-absorption m... | 1809.07150v1 |
2018-09-19 | Rapid Electron Backscatter Diffraction Mapping: Painting by Numbers | Microstructure characterisation has been greatly enhanced through the use of
electron backscatter diffraction (EBSD), where rich maps are generated through
analysis of the crystal phase and orientation in the scanning electron
microscope (SEM). Conventional EBSD analysis involves raster scanning of the
electron beam an... | 1809.07283v2 |
2018-09-24 | On the segregation of Re at dislocations in the γ' phase of Ni-based single crystal superalloys | We report evidence of Re and Mo segregation (up to 2.6 at.% and 1 at.%) along
with Cr and Co to the dislocations inside of {\gamma}' precipitates in a second
generation Ni-based single crystal superalloy, after creep deformation at
750{\deg}C under an applied stress of 800 MPa. The observed segregation effects
can be r... | 1809.08776v1 |
2018-09-19 | Thermal conductivity reduction by acoustic Mie resonance in nanoparticles | We evaluate the impact of acoustic Mie resonance in nanoparticles on the
thermal conductivity of semiconductor and polymer composites. By appropriately
choosing the bulk modulus and density, and selecting the size of the
nanoparticle to align the Mie resonances with the dominant portion of the
thermal conductivity spec... | 1809.08913v1 |
2018-09-25 | Theory of damping in magnetization dynamics, dispelling a myth and pointing a way forward | There is a widely-held belief amongst theoreticians that the Gilbert damping
parameter {\alpha} in magnetization dynamics is infinite for a pure metal at
T=0. The basic error leading to this belief is pointed out explicitly and the
various methods of calculation used are viewed in a unified way based on the
Lorentzian ... | 1809.09429v1 |
2018-09-26 | Strongly out-of-equilibrium columnar solidification during the Laser Powder-Bed Fusion additive manufacturing process | Laser-based additive manufacturing offers a promising route for 3D printing
of metallic parts. We evidence experimentally a particular columnar
solidification microstructure in a Laser Powder-Bed Fusion processed Inconel
718 nickel-based alloy, that we interpret using phase-field simulations and
classical dendritic gro... | 1809.09882v1 |
2018-09-26 | Thermoelectric studies of Ir$_{1-x}$Rh$_{x}$Te$_{2}$ (0 $\leqslant x \leqslant $ 0.3) | We report thermoelectric properties of Ir$_{1-x}$Rh$_x$Te$_2$ ($0 \leqslant x
\leqslant 0.3$) alloy series where superconductivity at low temperatures
emerges as the high-temperature structural transition ($T_s$) is suppressed.
The isovalent ionic substitution of Rh into Ir has different effects on
physical properties ... | 1809.10137v1 |
2018-09-27 | Competing rhombohedral and monoclinic crystal structures in Mn$Pn_2Ch_4$ compounds: an {\em ab-initio} study | Based on the relativistic spin-polarized density functional theory
calculations we investigate the crystal structure, electronic and magnetic
properties of a family MnPn2Ch4 compounds, where pnictogen metal atoms (Pn) are
Sb and Bi; chalcogens (Ch) are Se, Te. We show that in the series the compounds
of this family wit... | 1809.10343v1 |
2018-10-31 | Complex Crystals from Size-disperse Spheres | Colloids are rarely perfectly uniform but follow a distribution of sizes,
shapes, and charges. This dispersity can be inherent (static) or develop and
change over time (dynamic). Despite a long history of research, the conditions
under which non-uniform particles crystallize and which crystal forms is still
not well un... | 1811.00061v3 |
2018-11-06 | Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet | Magnetic skyrmions are vortex-like topological spin textures often observed
to form a triangular-lattice skyrmion crystal in structurally chiral magnets
with Dzyaloshinskii-Moriya interaction. Recently $\beta$-Mn structure-type
Co-Zn-Mn alloys were identified as a new class of chiral magnet to host such
skyrmion crysta... | 1811.02337v1 |
2018-11-06 | The influence of complex thermal treatment on mechanical properties of amorphous materials | We study the effect of periodic, spatially uniform temperature variation on
mechanical properties and structural relaxation of amorphous alloys using
molecular dynamics simulations. The disordered material is modeled via a
non-additive binary mixture, which is annealed from the liquid to the glassy
state with various c... | 1811.02365v1 |
2018-11-07 | Effects of dopants on the glass forming ability in Al-based metallic alloy | The effect of dopants on the metallic glass forming ability is usually
considered based on analysis of changes in the liquid structure or
thermodynamics. What is missing in such considerations is an analysis of how a
dopant changes the properties of the crystal phases which can form instead of
the glass. In order to il... | 1811.02985v3 |
2018-11-09 | Multi-Cell Monte Carlo Method for Phase Prediction | We propose a Multi-Cell Monte Carlo algorithm, or (MC)^2, for predicting
stable phases in chemically complex crystalline systems. Free atomic transfer
among cells is achieved via the application of the lever rule, where an
assigned molar ratio virtually controls the percentage of each cell in the
overall simulation, ma... | 1811.04092v1 |
2018-11-12 | Exploration of the Microstructure Space in TiAlZrN Ultra-Hard Nanostructured Coatings | Ti$_{1-x-y}$Al$_{x}$Zr$_{y}$N cubic alloys within the 25-70\% Al composition
range have high age-hardening capabilities due to metastable phase transition
pathways at high temperatures. They are thus ideal candidates for ultra-hard
nano-coating materials. There is growing evidence that this effect is
associated with th... | 1811.05017v1 |
2018-11-16 | Broken symmetry driven topological semi-metal to gaped phase transitions in SrAgAs | We show the occurence of Dirac, Triple point, Weyl semimetal and topological
insulating phase in a single ternary compound using specific symmetry
preserving perturbations. Based on {\it first principle} calculations,
\textbf{\textit{k.p}} model and symmetry analysis, we show that alloying
induced precise symmetry brea... | 1811.06685v2 |
2018-11-16 | Precise Kohn-Sham total-energy calculations at reduced cost | The standard way to calculate the Kohn-Sham orbitals utilizes an
approximation of the potential. The approximation consists in a projection of
the potential into a finite subspace of basis functions. The orbitals,
calculated with the projected potential, are used to evaluate the kinetic part
of the total energy, but th... | 1811.06788v1 |
2018-11-19 | Carbon nanotube-copper fibers produced by electrospinning: electrical conductivity measurements | Recent advances in nanotechnology have provided new materials which have the
potential to surpass copper and aluminum alloys in electrical conductivity,
weight and ampacity [2-6]. Among these carbon nanotubes (CNTs) stand out due to
their remarkable thermal and electrical conductivity and ampacity (103 times of
copper)... | 1811.07446v1 |
2018-11-19 | A model for the evolution of highly reversible martensitic transformations | In this work we introduce a new system of partial differential equations as a
simplified model for the evolution of reversible martensitic transformations
under thermal cycling in low hysteresis alloys. The model is developed in the
context of nonlinear continuum mechanics, where the developed theory is mostly
static, ... | 1811.07664v1 |
2018-11-20 | Analysis of a moving mask approximation for martensitic transformations | In this work we introduce a moving mask approximation to describe the
dynamics of austenite to martensite phase transitions at a continuum level. In
this framework, we prove a new type of Hadamard jump condition, from which we
deduce that the deformation gradient must be of the form $\mathsf{1}
+\mathbf{a}\otimes \math... | 1811.08247v1 |
2018-11-21 | Bonding mechanisms in cold spray deposition of gas atomised and solution heat-treated Al 6061 powder by EBSD | The heat-treatment of a number of gas atomised aluminium alloys prior to cold
spraying recently showed that the resultant microstructural modification was
accompanied by an improvement in deposition; however, the relationship between
the microstructural homogenisation occurring after recrystallisation and the
increase ... | 1811.08694v1 |
2018-11-21 | Electron effective mass and electronic structure in nonstoichiometric a-IGZO films | The transport properties and optical transmittance and absorption spectra for
the nostoichiometric amorphous Indium Gallium Zinc Oxide (a-IGZO) films with
Gallium and Zinc deficiencies are investigated. The resistivity and carrier
concentration variation with temperature both reveal that the films possess
degenerate se... | 1811.08766v2 |
2018-11-24 | Mutual Influence of Different Hydrogen Concentration in α-Zirconium System with Vacancies | Hydrogen embrittlement in zirconium alloys is one of current challenges of
nuclear reactor containment and can lead to a rapid decrease in mechanical
properties of materials. Although many previous studies investigated the
mechanism of hydrogen embrittlement at high hydrogen concentration, few studies
concentrate on th... | 1811.09856v1 |
2018-11-25 | Temperature-Dependent Magnetization Reversal in Exchange Bias NiFe/IrMn/NiFe Structures | We demonstrate the magnetization reversal features in NiFe/IrMn/NiFe
thin-film structures with 40% and 75% relative content of Ni in Permalloy in
the temperature range from 80 K to 300 K. At the descending branches of the
hysteresis loops, the magnetization reversal sequence of the two ferromagnetic
layers is found to ... | 1811.09963v1 |
2018-11-28 | 3D-Printed Chiral Metasurface as Dichroic Dual-Band Polarization Converter | We propose a novel design of a true 3D chiral metasurface behaving as a
spatial polarization converter with asymmetric transmission. The metasurface is
made of a lattice of metallic sesquialteral (one and a half pitch) helical
particles. Each particle contains six rectangular bars arranged in a series one
above the ano... | 1811.11747v1 |
2019-11-01 | Tuning interfacial Dzyaloshinskii-Moriya interactions in thin amorphous ferrimagnetic alloys | Skyrmions can be stabilized in magnetic systems with broken inversion
symmetry and chiral interactions, such as Dzyaloshinskii-Moriya interactions
(DMI). Further, compensation of magnetic moments in ferrimagnetic materials can
significantly reduce magnetic dipolar interactions, which tend to favor large
skyrmions. Tuni... | 1911.00607v1 |
2019-11-04 | Interatomic Potential in a Simple Dense Neural Network Representation | Simulations at the atomic scale provide a direct and effective way to
understand the mechanical properties of materials. In the regime of classical
mechanics, simulations for the thermodynamic properties of metals and alloys
can be done by either solving the equations of motion or performing Monte Carlo
sampling. The k... | 1911.01365v1 |
2019-11-06 | Ab initio typical medium theory of substitutional disorder | By merging single-site typical medium theory with density functional theory
we introduce a self-consistent framework for electronic structure calculations
of materials with substitutional disorder which takes into account Anderson
localization. The scheme and details of the implementation are presented and
applied to t... | 1911.02393v2 |
2019-11-07 | Green luminescence and calculated optical properties of Cu ions in ZnO | There are two characteristic optical transitions associated with Cu ions in
ZnO, the 0.72 eV infrared and the 2.86 eV structured green luminescence (SGL).
While the former is unambiguously related with the d(Cu2+) intra-shell
transition, there is no generally accepted mechanism of the SGL. Besides the
original model of... | 1911.02826v1 |
2019-11-13 | Effect of the polar distortion on the thermoelectric properties of GeTe | First principle calculations are performed to investigate the effect of polar
order strength on the thermoelectric (TE) properties of GeTe alloy in its
rhombohedral structure. The variation in the polarization state using various
ferroelectric distortions {\lambda} ({\lambda}=0,0.5,1.0,1.25,1.5) allows to
change the th... | 1911.05301v2 |
2019-11-13 | Strain and voltage control of magnetic and electric properties of FeRh films | FeRh based alloys may display an uncommon transition from a ferromagnetic to
an antiferromagnetic state upon cooling. The transition takes place roughly
above room temperature and it can be sensitively modulated by composition and
external parameters, including pressure and strain. Consequently, thin films of
FeRh have... | 1911.05334v1 |
2019-11-19 | Stochastic estimations of a total number of classes for the clusterings with too enormous samples to be accommodate into a clustering engine | We considered the problem how to handle the exploding number of possibilities
to be sorted into irreducible classes by using a clustering tool when its input
capacity cannot accommodate the total number of the possibility. Concrete
situations are explained taking examples of atomic substitutions in the
supercell modeli... | 1911.08071v2 |
2019-11-27 | Coupled Sublattice Melting and Charge-Order Transition in Two Dimensions | Two-dimensional melting is one of the most fascinating and poorly understood
phase transitions in nature. Theoretical investigations often point to a
two-step melting scenario involving unbinding of topological defects at two
distinct temperatures. Here we report on a novel melting transition of a
charge-ordered K-Sn a... | 1911.11921v1 |
2019-11-27 | Computational screening of magnetocaloric alloys | An exciting development over the past few decades has been the use of
high-throughput computational screening as a means of identifying promising
candidate materials for a variety of structural or functional properties.
Experimentally, it is often found that the highest-performing materials contain
substantial atomic s... | 1911.12218v3 |
2019-11-29 | Galvanic Replacement Reaction to prepare nanoporous Aluminum for UV plasmonics | Plasmonics applications have been extending into the ultraviolet region of
the electromagnetic spectrum. Unfortunately the commonly used noble metals have
intrinsic optical properties that limit their use above 350 nm. Aluminum is
probably the most suitable material for UV plasmonics and in this work we show
that nanop... | 1911.13198v1 |
2020-01-07 | Electrical transport properties of bulk tetragonal CuMnAs | Temperature-dependent resistivity and magnetoresistance are measured in bulk
tetragonal phase of antiferromagnetic CuMnAs and the latter is found to be
anisotropic both due to structure and magnetic order. We compare these findings
to model calculations with chemical disorder and finite-temperature phenomena
included. ... | 2001.01947v3 |
2020-01-08 | Enhanced attraction between particles in a bidisperse mixture with random pair-wise interactions | Motivated by growing interests in multicomponent metallic alloys and complex
fluids, we study a complex mixture with bidispersity in size and polydispersity
in energy. The energy polydispersity in the system is introduced by considering
random pair-wise interactions between the particles. Extensive molecular
dynamics s... | 2001.02730v1 |
2020-01-15 | Effective interaction model for coupled magnetism and phase stability in bcc Fe-Co systems | We present an ab-initio-based effective interaction model (EIM) for the study
of magnetism, thermodynamics, and their interplay in body-centered cubic Fe-Co
alloys, with Co content from 0 to 70%. The model includes explicitly both spin
and chemical variables. For the former, a Heisenberg formalism is adopted. But,
the ... | 2001.05342v1 |
2020-01-15 | Quantum critical point in the itinerant ferromagnet Ni$_{1-x}$Rh$_x$ | We report a chemical substitution-induced ferromagnetic quantum critical
point in polycrystalline Ni$_{1-x}$Rh$_x$ alloys. Through magnetization and
muon spin relaxation measurements, we show that the ferromagnetic ordering
temperature is suppressed continuously to zero at $x_{crit} = 0.375$ while the
magnetic volume f... | 2001.05533v1 |
2020-01-21 | Single photon emission from droplet epitaxial quantum dots in the standard telecom window around a wavelength of 1.55 $μ$m | We study the luminescence dynamics of telecom wavelength InAs quantum dots
grown on InP(111)A by droplet epitaxy. The use of the ternary alloy InAlGaAs as
a barrier material leads to photon emission in the 1.55 $\mu$m telecom C-band.
The luminescence decay is well described in terms of the theoretical interband
transit... | 2001.07329v1 |
2020-01-29 | Morphological analysis of 3d atom probe data using Minkowski functionals | We present a morphological analysis of atom probe data of nanoscale
microstructural features, using methods developed by the astrophysics community
to describe the shape of superclusters of galaxies. We describe second-phase
regions using Minkowski functionals, representing the regions' volume, surface
area, mean curva... | 2001.10762v1 |
2020-01-29 | An atomistic perspective of martensite twinning in Iron | The martensitic transformation is one of the most important phenomena in
metals science due to its essential contribution to the strength of steels and
most engineering alloys. Yet the basic, atomistic mechanisms leading to
martensite nucleation and twin morphology are not yet known. A detailed picture
in this regard i... | 2001.11053v1 |
2020-01-30 | Extreme Fermi surface smearing in a maximally disordered concentrated solid solution | We show that the Fermi surface can survive the presence of extreme
compositional disorder in the equiatomic alloy
Ni$_{0.25}$Fe$_{0.25}$Co$_{0.25}$Cr$_{0.25}$. Our high-resolution Compton
scattering experiments reveal a Fermi surface which is smeared across a
significant fraction of the Brillouin zone (up to 40\% of $\... | 2001.11416v1 |
2020-01-30 | Disorder Dependence of Interface Spin Memory Loss | The discontinuity of a spin-current through an interface caused by spin-orbit
coupling is characterized by the spin memory loss (SML) parameter {\delta}. We
use first-principles scattering theory and a recently developed local current
scheme to study the SML for Au|Pt, Au|Pd, Py|Pt and Co|Pt interfaces. We find a
minim... | 2001.11520v1 |
2021-07-02 | Calculations of Real-System Nanoparticles Using Universal Neural Network Potential PFP | It is essential to explore the stability and activity of real-system
nanoparticles theoretically. While applications of theoretical methods for this
purpose can be found in literature, the expensive computational costs of
conventional theoretical methods hinder their massive applications to practical
materials design. ... | 2107.00963v1 |
2021-07-11 | Sampling Lattices in Semi-Grand Canonical Ensemble with Autoregressive Machine Learning | Calculating thermodynamic potentials and observables efficiently and
accurately is key for the application of statistical mechanics simulations to
materials science. However, naive Monte Carlo approaches, on which such
calculations are often dependent, struggle to scale to complex materials in
many state-of-the-art dis... | 2107.05109v2 |
2021-07-12 | Large anomalous Nernst effect in non-crystalline Gd-Fe ferrimagnetic alloy films for flexible thermoelectric applications | The anomalous Nernst effect (ANE), a heat-charge conversion mechanism based
on a magnetic metal, has been extensively studied for application in thin
thermoelectric devices. The low magnetization and fabrication at room
temperature are important for flexible ANE thermoelectric devices on plastic
substrates. Therefore, ... | 2107.05215v2 |
2021-07-16 | Discovery and implications of hidden atomic-scale structure in a metallic meteorite | Iron and its alloys have made modern civilisation possible, with metallic
meteorites providing one of the human's earliest sources of usable iron as well
as providing a window into our solar system's billion-year history. Here
highest-resolution tools reveal the existence of a previously hidden FeNi
nanophase within th... | 2107.07909v1 |
2021-07-27 | Dislocation assisted phase separation: a phase field study | Defects play a key role in deciding the mechanisms and kinetics of phase
transformations. In this paper, we show how dislocations influence phase
separation in alloys with miscibility gap. Specifically, depending on the ratio
of pipe mobility to bulk mobility, it is seen that even in a system with
nominal compositions ... | 2107.12703v1 |
2021-07-28 | Isotopic effect of proton conductivity in barium-zirconates for various hydrogen-containing atmospheres | Among various perovskite proton conducting oxides, Y-doped BaZrO3 perovskite
is a promising material for electrochemical hydrogen devices due to the good
chemical stability and higher proton conductivity at higher operating
temperatures like 500-800 {\deg}C. For the practical application of the
functional BaZrO3 proton... | 2107.13604v1 |
2017-04-11 | Low temperature transport properties of pyrolytic graphite sheet | We have made thermal and electrical transport measurements of uncompressed
pyrolytic graphite sheet (uPGS), a mass-produced thin graphite sheet with
various thicknesses between 10 and 100 {\mu}m, at temperatures between 2 and
300 K. Compared to exfoliated graphite sheets like Grafoil, uPGS has much
higher conductivitie... | 1704.03204v2 |
2017-04-12 | Ultra-fast magnetization manipulation using single femtosecond light and hot-electrons pulse | Current induced magnetization manipulation is a key issue for spintronic
application. Therefore, deterministic switching of the magnetization at the
picoseconds timescale with a single electronic pulse represents a major step
towards the future developments of ultrafast spintronic. Here, we have studied
the ultrafast m... | 1704.03749v1 |
2017-04-13 | Switching of magnetic ground states across the UIr1-xRhxGe alloy system | We investigated the evolution of magnetism in the UIr1-xRhxGe system by the
systematic study of high-quality single crystals. Lattice parameters of both
parent compounds are very similar resulting in almost identical nearest
interatomic uranium distance close to the Hill limit. We established the x-T
phase diagram of t... | 1704.04013v1 |
2017-04-13 | almaBTE: a solver of the space-time dependent Boltzmann transport equation for phonons in structured materials | almaBTE is a software package that solves the space- and time-dependent
Boltzmann transport equation for phonons, using only ab-initio calculated
quantities as inputs. The program can predictively tackle phonon transport in
bulk crystals and alloys, thin films, superlattices, and multiscale structures
with size feature... | 1704.04142v1 |
2017-04-21 | Optically pumped GeSn micro-disks with 16 % Sn lasing at 3.1 um up to 180K | Recent demonstrations of optically pumped lasers based on GeSn alloys put
forward the prospect of efficient laser sources monolithically integrated on a
Si photonic platform. For instance, GeSn layers with 12.5% of Sn were reported
to lase at 2.5 um wavelength up to 130 K. In this work, we report a longer
emitted wavel... | 1704.06436v1 |
2017-04-28 | Retrieving the quantitative chemical information at nanoscale from SEM EDX measurements by Machine Learning | The quantitative composition of metal alloy nanowires on InSb(001)
semiconductor surface and gold nanostructures on germanium surface is
determined by blind source separation (BSS) machine learning (ML) method using
non negative matrix factorization (NMF) from energy dispersive X-ray
spectroscopy (EDX) spectrum image m... | 1705.00081v1 |
2017-05-01 | Large Thermoelectric Power Factor at Low Temperatures in One-Dimensional Telluride Ta4SiTe4 | We report the discovery of a very large thermoelectric power over -400 microV
K-1 in the whisker crystals of a one-dimensional telluride Ta4SiTe4, while
maintaining a low electrical resistivity of rho = 2 mohm cm, yielding a very
large power factor of P = 80 microW cm-1 K-2 at an optimum temperature of 130
K. This temp... | 1705.00404v1 |
2017-05-02 | A regression-based feature selection study of the Curie temperature of transition-metal rare-earth compounds: prediction and understanding | The Curie temperature ($T_C$) of binary alloy compounds consisting of 3$d$
transition-metal and 4$f$ rare-earth elements is analyzed by a machine learning
technique. We first demonstrate that nonlinear regression can accurately
reproduce $T_C$ of the compounds. The prediction accuracy for $T_C$ is
maximized when five t... | 1705.00978v2 |
2017-05-02 | Machine learning reveals orbital interaction in crystalline materials | We propose a novel representation of crystalline materials named
orbital-field matrix (OFM) based on the distribution of valence shell
electrons. We demonstrate that this new representation can be highly useful in
mining material data. Our experiment shows that the formation energies of
crystalline materials, the atomi... | 1705.01043v2 |
2017-05-11 | Predicted novel insulating electride compound between alkali metals lithium and sodium under high pressure | The application of high pressure can fundamentally modify the crystalline and
electronic structures of elements as well as their chemical reactivity, which
could lead to the formation of novel materials. Here, we explore the reactivity
of lithium with sodium under high pressure, using a swarm structure searching
techni... | 1705.04213v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.