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Spin superfluidity, i.e., coherent spin transport mediated by topologically stable textures, is limited by parasitic anisotropies rooted in relativistic interactions and spatial inhomogeneities. Since structural disorder in amorphous…

Mesoscale and Nanoscale Physics · Physics 2018-08-29 Hector Ochoa , Ricardo Zarzuela , Yaroslav Tserkovnyak

We consider a quasi one-dimensional configuration consisting of two small pieces of ferromagnetic material separated by a metallic one and contacted by two metallic leads. A spin-polarized current is injected from one lead. Our goal is to…

Mesoscale and Nanoscale Physics · Physics 2007-06-13 J. Peguiron , M. -S. Choi , C. Bruder

The reflection coefficient of bulk spin waves from multilayer ferromagnetic structure with periodically modulated parameters of exchange interaction, uniaxial and rhombic magnetic anisotropy and saturation magnetization is calculated with a…

Materials Science · Physics 2009-01-15 Sergey A Reshetnyak , Tat'yana A Homenko

In spite of the absence of a macroscopic magnetic moment, an anti-ferromagnet is spin-polarized on an atomic scale. The electric current passing through a conducting anti-ferromagnet is polarized as well, leading to spin-transfer torques…

Materials Science · Physics 2009-09-29 Yuan Xu , Shuai Wang , Ke Xia

Spin superfluids enable long-distance spin transport through classical ferromagnets by developing topologically stable magnetic textures. For small spins at low dimensions, however, the topological protection suffers from strong quantum…

Mesoscale and Nanoscale Physics · Physics 2018-10-30 Silas Hoffman , Daniel Loss , Yaroslav Tserkovnyak

Spin-dependent transport is investigated in ballistic regime through the interface between a ferromagnet and a spin spiral. We show that spin-dependent interferences lead to a new type of diffraction called "spin-diffraction". It is shown…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Aurélien Manchon , Natalya Ryzhanova , A. Vedyayev , Bernard Dieny

This paper has two parts. The first part uses a single point of view to discuss the reflection and averaging mechanisms of spin-transfer between current-carrying electrons and the ferromagnetic layers of magnetic/non-magnetic…

Materials Science · Physics 2009-11-07 M. D. Stiles , A. Zangwill

We report that atomic-layer alloying (intermixing) at a Pt/Co interface can increase, by approximately 30%, rather than degrade the interfacial spin transparency, and thereby strengthen the efficiency of the dampinglike spin-orbit torque…

Materials Science · Physics 2019-05-15 Lijun Zhu , Daniel C. Ralph , Robert A. Buhrman

In the presence of a strong magnetic field, the quark gluon plasma is magnetized, leading to anisotropic transport coefficients. In this work, we focus on the effect of magnetization on electric conductivity, ignoring the possible…

High Energy Physics - Theory · Physics 2019-09-26 Wei Li , Shu Lin , Jiajie Mei

The comparison of transverse spin wave spectra and its attenuation in Heisenberg ferromagnet and in ferromagnetic Fermi liquid as well in polarized Fermi liquid is undertaken. The transverse spin waves frequency in polarized paramagnetic…

Strongly Correlated Electrons · Physics 2007-05-23 V. P. Mineev

The spin-dependent transport properties of paramagnetic metals are roughly invariant under rotation. By contrast, in ferromagnetic materials the magnetization breaks the rotational symmetry, and thus the spin Hall effect is expected to…

Processes which flip the spin of an electron tunneling in a junction made up of magnetic electrodes are studied. It is found that: i) Magnetic impurities give a contribution which increases the resistance and lowers the magnetoresistance,…

Mesoscale and Nanoscale Physics · Physics 2009-10-30 F. Guinea

The magnetoimpedance effect is a versatile tool to investigate ferromagnetic materials, revealing aspects on the fundamental physics associated to magnetization dynamics, broadband magnetic properties, important issues for current and…

Materials Science · Physics 2015-06-23 M. A. Corrêa , F. Bohn , R. B. da Silva , R. L. Sommer

Of concern in this paper is an investigation of peristaltic transport of a physiological fluid in an asymmetric channel under long wave length and low-Reynolds number assumptions. The flow is assumed to be incompressible, viscous,…

Fluid Dynamics · Physics 2010-07-07 G. C. Shit , M. Roy , E. Y. K. Ng

Superconductor-ferromagnet tunnel junctions demonstrate giant thermoelectric effects which are being exploited to engineer ultra-sensitive terahertz radiation detectors. Here, we experimentally observe the recently predicted complete…

A long-ranged dynamic interaction between ferromagnetic films separated by normal-metal spacers is reported, which is communicated by nonequilibrium spin currents. It is measured by ferromagnetic resonance (FMR) and explained by an…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 Bret Heinrich , Yaroslav Tserkovnyak , Georg Woltersdorf , Arne Brataas , Radovan Urban , Gerrit E. W. Bauer

We investigate the conductivity in layered metals in magnetic field in the weakly incoherent limit, when the interlayer transfer integral is smaller than the Landau level broadening due to the impurity potential, but the interlayer electron…

Mesoscale and Nanoscale Physics · Physics 2011-11-11 Pavel D. Grigoriev

We consider the NMR signal from a permeable medium with a heterogeneous Larmor frequency component that varies on a scale comparable to the spin-carrier diffusion length. We focus on the mesoscopic part of the transverse relaxation, that…

Mesoscale and Nanoscale Physics · Physics 2008-10-23 D. S. Novikov , V. G. Kiselev

We study the magnetic damping in the simplest of synthetic antiferromagnets, i.e. antiferromagnetically exchange-coupled spin valves in which applied magnetic fields tune the magnetic configuration to become noncollinear. We formulate the…

Mesoscale and Nanoscale Physics · Physics 2015-08-07 Takahiro Chiba , Gerrit E. W. Bauer , Saburo Takahashi

We report an observation of spin-valve like hysteresis within a few atomic layers at a ferromagnetic interface. We use phonon spectroscopy of nanometer sized point contacts as an in-situ probe to study the mechanism of the effect. Distinct…

Mesoscale and Nanoscale Physics · Physics 2015-06-25 I. K. Yanson , Yu. G. Naidyuk , V. V. Fisun , A. Konovalenko , O. P. Balkashin , L. Yu. Triputen , V. Korenivski