Threshold current of domain wall motion under extrinsic pinning, β-term and non-adiabaticity

被引：88

作者：

Tatara, Gen

Takayama, Toshihiko

Kohno, Hiroshi

Shibata, Junya

Nakatani, Yoshinobu

Fukuyama, Hidetoshi

机构：

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

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

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

[4] RIKEN, Inst Phys & Chem Res, FRS, Wako, Saitama 3510198, Japan

[5] Univ Electrocommun, Dept Comp Sci, Chofu, Tokyo 1828585, Japan

[6] Tohoku Univ, Mat Res Inst, Int Frontier Ctr Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 06期

关键词：

spin torque; domain wall; threshold current; MRAM;

D O I：

10.1143/JPSJ.75.064708

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Threshold current of domain wall motion under spin-polarized electric current in ferromagnets is theoretically studied based on the equation of motion of a wall in terms of collective coordinates. Effects of non-adiabaticity and a so-called beta-term in Landau-Lifshitz equation, which are described by the same term in the equation of motion of a wall, are taken into account as well as extrinsic pinning. It is demonstrated that there are four different regimes characterized by different dependence of threshold on extrinsic pinning, hard-axis magnetic anisotropy, non-adiabaticity and beta.

引用

页数：7

共 37 条

[1] Current-spin coupling for ferromagnetic domain walls in fine wires
Barnes, SE
Maekawa, S
[J]. 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
Bazaliy, YB
Jones, BA
Zhang, SC
[J]. PHYSICAL REVIEW B, 1998, 57 (06): : R3213 - R3216
[3] Analysis of measured transport properties of domain walls in magnetic nanowires and films
Berger, L
[J]. PHYSICAL REVIEW B, 2006, 73 (01):
[4] LOW-FIELD MAGNETORESISTANCE AND DOMAIN DRAG IN FERROMAGNETS
BERGER, L
[J]. JOURNAL OF APPLIED PHYSICS, 1978, 49 (03) : 2156 - 2161
[5] EXCHANGE INTERACTION BETWEEN FERROMAGNETIC DOMAIN-WALL AND ELECTRIC-CURRENT IN VERY THIN METALLIC-FILMS
BERGER, L
[J]. JOURNAL OF APPLIED PHYSICS, 1984, 55 (06) : 1954 - 1956
[6] MOTION OF A MAGNETIC DOMAIN-WALL TRAVERSED BY FAST-RISING CURRENT PULSES
BERGER, L
[J]. JOURNAL OF APPLIED PHYSICS, 1992, 71 (06) : 2721 - 2726
[7] Self-consistent theory of current-induced switching of magnetization
Edwards, DM
Federici, F
Mathon, J
Umerski, A
[J]. PHYSICAL REVIEW B, 2005, 71 (05)
[8] Switching a spin valve back and forth by current-induced domain wall motion
Grollier, J
Boulenc, P
Cros, V
Hamzic, A
Vaurès, A
Fert, A
Faini, G
[J]. APPLIED PHYSICS LETTERS, 2003, 83 (03) : 509 - 511
[9] Current-driven domain-wall motion in magnetic wires with asymmetric notches
Himeno, A
Kasai, S
Ono, T
[J]. APPLIED PHYSICS LETTERS, 2005, 87 (24) : 1 - 2
[10] Direct observation of domain-wall configurations transformed by spin currents -: art. no. 026601
Kläui, M
Jubert, PO
Allenspach, R
Bischof, A
Bland, JAC
Faini, G
Rüdiger, U
Vaz, CAF
Vila, L
Vouille, C
[J]. PHYSICAL REVIEW LETTERS, 2005, 95 (02)

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