Microscopic calculation of spin torques and forces

被引：11

作者：

Kohno, H. ^{[1
]}

Tatara, G.

Shibata, J.

Suzuki, Y.

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[2] Tokyo Metropolitan Univ, Grad Sch Sci, Hachioji, Tokyo 1920397, Japan

[3] PRESTO, JST, Kawaguchi, Saitama 3320012, Japan

[4] RIKEN, FRS, Wako, Saitama 35101, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

Landau-Lifshitz-Gilbert equation; spin current; spin torque; force; spin relaxation; magnetic domain wall; magnetic vortex;

D O I：

10.1016/j.jmmm.2006.10.928

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin torques, that is, effects of conduction electrons on magnetization dynamics, are calculated microscopically in the first order in spatial gradient and time derivative of magnetization. Special attention is paid to the so-called beta-term and the Gilbert damping, alpha, in the presence of electrons' spin-relaxation processes, which are modeled by quenched magnetic impurities. Two types of forces that the electric/spin current exerts on magnetization are identified based on a general formula relating the force to the torque. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：2020 / 2022

页数：3

共 20 条

[1] Current-spin coupling for ferromagnetic domain walls in fine wires [J].

Barnes, SE ;

Maekawa, S .

PHYSICAL REVIEW LETTERS, 2005, 95 (10)

[2] Modification of the Landau-Lifshitz equation in the presence of a spin-polarized current in colossal- and giant-magnetoresistive materials [J].

Bazaliy, YB ;

Jones, BA ;

Zhang, SC .

PHYSICAL REVIEW B, 1998, 57 (06) :R3213-R3216

[3] EXCHANGE INTERACTION BETWEEN FERROMAGNETIC DOMAIN-WALL AND ELECTRIC-CURRENT IN VERY THIN METALLIC-FILMS [J].

BERGER, L .

JOURNAL OF APPLIED PHYSICS, 1984, 55 (06) :1954-1956

[4] Emission of spin waves by a magnetic multilayer traversed by a current [J].

Berger, L .

PHYSICAL REVIEW B, 1996, 54 (13) :9353-9358

[5] Current-driven switching of magnetic layers [J].

Heide, C ;

Zilberman, PE ;

Elliott, RJ .

PHYSICAL REVIEW B, 2001, 63 (06)

[6] Current-induced vortex displacement and annihilation in a single permalloy disk [J].

Ishida, T. ;

Kimura, T. ;

Otani, Y. .

PHYSICAL REVIEW B, 2006, 74 (01)

[7] Current-driven resonant excitation of magnetic vortices [J].

Kasai, Shinya ;

Nakatani, Yoshinobu ;

Kobayashi, Kensuke ;

Kohno, Hiroshi ;

Ono, Teruo .

PHYSICAL REVIEW LETTERS, 2006, 97 (10)

[8] Microscopic calculation of spin torques in disordered ferromagnets [J].

Kohno, Hiroshi ;

Tatara, Gen ;

Shibata, Junya .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2006, 75 (11)

[9] Spin anisotropy and quantum Hall effect in the kagome lattice:: Chiral spin state based on a ferromagnet [J].

Ohgushi, K ;

Murakami, S ;

Nagaosa, N .

PHYSICAL REVIEW B, 2000, 62 (10) :R6065-R6068

[10] Current-induced magnetic vortex motion by spin-transfer torque [J].

Shibata, J ;

Nakatani, Y ;

Tatara, G ;

Kohno, H ;

Otani, Y .

PHYSICAL REVIEW B, 2006, 73 (02)

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