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We study anomalous magnetohydrodynamics in a longitudinal boost invariant Bjorken flow with constant anisotropic electric conductivities as outlined in Ref. [1]. For simplicity, we consider a neutral fluid and a force-free magnetic field in…

高能物理 - 唯象学 · 物理学 2021-02-03 Ren-jie Wang , Patrick Copinger , Shi Pu

We present ab initio calculations of the evolution of anisotropic magnetoresistance (AMR) in Ni nanocontacts from the ballistic to the tunnel regime. We find an extraordinary enhancement of AMR, compared to bulk, in two scenarios. In…

介观与纳米尺度物理 · 物理学 2008-04-16 D. Jacob , J. Fernandez-Rossier , J. J. Palacios

We investigate a semiclassical momentum density energy functional for atoms and show that it yields the same value as the well-known Thomas-Fermi functional. In fact, we show an explicit relation between the minimizers of the two…

数学物理 · 物理学 2013-11-18 Verena von Conta , Heinz Siedentop

Compact objects have an intrinsic anisotropy due to the presence of strong magnetic fields that cause considerable modifications on the equations of state (EoS). In this work, we study the impact of this anisotropy in the size and shape of…

广义相对论与量子宇宙学 · 物理学 2020-02-05 S. López Pérez , D. Manreza Paret , G. Quintero Angulo , A. Pérez Martínez , D. Alvear Terrero

We develop a model for ferromagnetic resonance in systems with competing uniaxial and cubic anisotropies. This model applies to (i) magnetic materials with both uniaxial and cubic anisotropies, and (ii) magnetic nanoparticles with effective…

其他凝聚态物理 · 物理学 2015-06-25 H. Kachkachi , D. S. Schmool

Anisotropic magnetoresistance (AMR) arises from symmetry lowering of the conductivity tensor induced by magnetic order. In simple ferromagnets, AMR is a relativistic effect, relying on spin-orbit interaction (SOC). Here, we demonstrate that…

材料科学 · 物理学 2025-07-17 Philipp Ritzinger , Ondřej Sedláček , Jakub Železný , Karel Výborný

The magnetic properties of iron (spin and orbital magnetic moments, magnetocrystalline anisotropy energy) in various geometries and dimensionalities are investigated by using a parametrized tight-binding model in an $s$, $p$ and $d$ atomic…

Faraday rotation of the polarization plane in magnetized thermal plasma provides one of the most efficient methods to deduce regular magnetic fields from radio astronomical observations. Since the Faraday rotation measure RM is proportional…

天体物理学 · 物理学 2009-11-10 Rainer Beck , Anvar Shukurov , Dmitry Sokoloff , Richard Wielebinski

A detailed study is made of the space-time transformation properties of intercharge forces and the associated electric and magnetic force fields, both in classical electrodynamics and in a recently developed relativistic classical…

综合物理 · 物理学 2009-09-01 J. H. Field

The effect on dynamo action of an anisotropic electrical conductivity conjugated to an anisotropic magnetic permeability is considered. Not only is the dynamo fully axisymmetric, but it requires only a simple differential rotation, which…

等离子体物理 · 物理学 2021-02-09 Franck Plunian , Thierry Alboussière

We predict a huge anisotropic thermal magnetoresistance (ATMR) in the near-field radiative heat transfer between magneto-optical particles when the direction of an external magnetic field is changed with respect to the heat current…

Longitudinal and transverse behavior of magnetic field of relativistic nonlinear three-dimensional plasma wave is investigated. It is shown that the magnetic field of the wave is different from zero and performs higher frequency…

等离子体物理 · 物理学 2009-11-06 A. G. Khachatryan

The Monte Carlo method in the canonical ensemble is used to investigate magnetization reversal in amorphous transition metal - rare earth multilayers. Our study is based on a model containing diluted clusters which exhibit an effective…

材料科学 · 物理学 2009-12-01 Etienne Talbot , Denis Ledue , Pierre Emmanuel Berche

The conductance of a ferromagnetic particle depends on the relative orientation of the magnetization with respect to the direction of current flow. This phenomenon is known as "anisotropic magnetoresistance". Quantum interference leads to…

介观与纳米尺度物理 · 物理学 2007-05-23 Shaffique Adam , Markus Kindermann , Saar Rahav , Piet W. Brouwer

We report magneto-crystalline anisotropy (MCA) calculations of Fe, Co and Ni slabs of various thicknesses and crystallographic orientations from two Density Functional Theory codes based either on a plane wave or a local atomic basis set…

材料科学 · 物理学 2020-01-08 Ludovic Le Laurent , Cyrille Barreteau , Troel Markussen

The calculation of magnetic anisotropy constants is performed beyond the point charge model for a continuous charge density distribution of screening conduction electrons. An important role of the non-uniform electron density, in…

凝聚态物理 · 物理学 2009-10-31 V. Yu. Irkhin , Yu. P. Irkhin

The magnetic field of moving vortices in anisotropic superconductors is considered in the framework of time-dependent London approach. It is found that at distances large relative to the core size, the field may change sign that alludes to…

超导电性 · 物理学 2021-10-04 V. G. Kogan , N. Nakagawa

We report on an experimental active matter system with motion restricted to four cardinal directions. Our particles are magnetite-doped colloidal spheres driven by the Quincke electrorotational instability. The absence of a magnetic field…

软凝聚态物质 · 物理学 2025-11-17 Eavan Fitzgerald , Cécile Clavaud , Debasish Das , Isaac C. D. Lenton , Scott R. Waitukaitis

Characterizing the anisotropic structure in noncollinear antiferromagnets is essential for antiferromagnetic spintronics. In this work, we provide a microscopic theory linking the anisotropy effects induced by the rigid-body rotation of…

材料科学 · 物理学 2025-07-15 Zheng Liu , Yang Gao , Qian Niu

We theoretically demonstrate an orthogonal Einstein-de Haas effect, where the rotation of ferromagnetic materials is caused by the change of magnetization in the direction orthogonal to the rotation axis. This amounts to an anisotropic…

介观与纳米尺度物理 · 物理学 2026-01-27 Rui Xue , Zhenhua Qiao , Yang Gao , Qian Niu