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This paper is devoted to numerical simulations of the magnetization dynamics driven by a spin-polarized current in extended ferromagnetic multilayers when a point-contact setup is used. We present (i) detailed analysis of methodological…

Mesoscale and Nanoscale Physics · Physics 2015-06-25 D. V. Berkov , N. L. Gorn

We investigate the spin Seebeck effect and spin pumping in a junction between a ferromagnetic insulator and a magnetic impurity deposited on a normal metal. By the numerical renormalization group calculation, we show that spin current is…

Mesoscale and Nanoscale Physics · Physics 2021-09-15 Tsuyoshi Yamamoto , Takeo Kato , Mamoru Matsuo

Spin transport driven by the temperature gradient in ferromagnetic metals is studied based on a microscopic theory. It is shown that the temperature gradient works as an effective field equivalent to the electric field as for both the spin…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 Yuu Takezoe , Kazuhiro Hosono , Akihito Takeuchi , Gen Tatara

We investigate the current-induced spin-orbit torque in antiferromangnetic materials in the presence of Rashba spin orbit coupling using both the linear response theory and the non-equilibrium Green's function technique implemented on a…

Mesoscale and Nanoscale Physics · Physics 2016-06-15 Hamed Ben Mohamed Saidaoui , Aurelien Manchon

The spin Seebeck effect has recently been demonstrated as a viable method of direct energy conversion that has potential to outperform energy conversion from the conventional Seebeck effect. In this study, a computational transport model is…

Computational Physics · Physics 2017-12-13 Anveeksh Koneru , Terence D. Musho

We develop a macroscopic description of the current-induced torque due to spin transfer in a layered system consisting of two ferromagnetic layers separated by a nonmagnetic layer. The description is based on i) the classical spin diffusion…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 J. Barnas , A. Fert , M. Gmitra , I. Weymann , V. K. Dugaev

Interaction between local magnetization and conduction electrons is responsible for a variety of phenomena in magnetic materials. It has been recently shown that spin current and associated electric voltage can be induced by magnetization…

Mesoscale and Nanoscale Physics · Physics 2018-12-31 Yuta Yamane , Shayan Hemmatiyan , Jun'ichi Ieda , Sadamichi Maekawa , Jairo Sinova

We present a phenomenological theory of spin-orbit torques in a metallic ferromagnet with spin-relaxing boundaries. The model is rooted in the coupled diffusion of charge and spin in the bulk of the ferromagnet, where we account for the…

Mesoscale and Nanoscale Physics · Physics 2021-07-14 Hector Ochoa , Ricardo Zarzuela , Yaroslav Tserkovnyak

By using the projection operator technique it is observed that the strong Hund's rule coupling and s-d interaction in transition metal elements may lead to an effective coupling between the spin current and spin spirality. As a result, the…

Strongly Correlated Electrons · Physics 2009-11-07 S. Q. Shen , X. C. Xie

Following the theoretical approach by Xiao et al [Phys. Rev. B 81, 214418 (2010)] to the spin Seebeck effect, we calculate the mean value of the total spin current flowing through a normalmetal/ ferromagnet interface. The spin current…

Mesoscale and Nanoscale Physics · Physics 2015-06-17 L. Chotorlishvili , Z. Toklikishvili , V. K. Dugaev , J. Barnas , S. Trimper , J. Berakdar

A formula of the spin current in mesoscopic superconductors is derived from the mean-field theory of superconductivity. The spin flow is generated by the spatial fluctuations of $\vec{d}$ which represents a spin state of spin-triplet…

Superconductivity · Physics 2009-11-11 Y. Asano

Based on the spinor Boltzmann equation, we obtain a temperature dependent thermal spin-orbit torque in terms of the local equilibrium distribution function in a two dimensional ferromagnet with Dresselhaus spin-orbit coupling. We also…

Mesoscale and Nanoscale Physics · Physics 2023-11-28 Chun Yi Xue , Ya Ru Wang , Zheng Chuan Wang

Current-induced torques are commonly used to manipulate non-collinear magnetization configurations. In this article we discuss current-induced torques present in a certain class of collinear magnetic systems, relating them to…

Materials Science · Physics 2015-05-13 Ion Garate , Allan H. MacDonald

Theoretical investigations of spin transfer torque in magnetic tunnel junctions using the tight-binding model in the framework of non-equilibrium Green functions formalism are presented. We show that the behavior of the spin transfer torque…

Materials Science · Physics 2009-11-13 M. Chshiev , I. Theodonis , A. Kalitsov , N. Kioussis , W. H. Butler

We investigate the spin-transfer torque in a magnetic multilayer structure by means of a spin-diffusion model. The torque in the considered system, consisting of two magnetic layers separated by a conducting layer, is caused by a…

We study the current-driven motion of metastable localized spin structures with various topological charges in a (Pt$_{1-x}$Ir$_{x}$)/Fe bilayer on a Pd(111) surface by combining atomistic spin model simulations with an approach based on…

Mesoscale and Nanoscale Physics · Physics 2019-07-03 Markus Weißenhofer , Ulrich Nowak

We investigate laser-induced torques in magnetically non-collinear ferromagnets with a spin-spiral magnetic structure using \textit{ab-initio} calculations. Since spin-spirals may be used to approximate the magnetization gradients locally…

Materials Science · Physics 2021-02-04 Frank Freimuth , Yuriy Mokrousov , Stefan Blügel

Non-equilibrium spin transport in a magnetic tunnel junction comprising a single magnetic layer in the presence of interfacial spin-orbit interaction (SOI) is studied theoretically. The interfacial SOI generates a spin torque of the form…

Mesoscale and Nanoscale Physics · Physics 2015-05-30 A. Manchon

We consider theoretically a current flowing perpendicular to interfaces of a spin-valve type ferromagnetic metallic junction. For the first time an effective approach is investigated to calculate a simultaneous action of the two current…

Materials Science · Physics 2009-11-11 R. J. Elliott , E. M. Epshtein , Yu. V. Gulyaev , P. E. Zilberman

The instant Lagranian coordinator system is used to describe the fluid material motion. By this way, the instant deformation gradient (expressed by spatial velocity gradient) concept is established. Based on this geometrical understanding,…

Fluid Dynamics · Physics 2007-05-23 Jianhua Xiao