Spin-transfer pulse switching: From the dynamic to the thermally activated regime

被引：121

作者：

Bedau, D. ^{[1
]}

Liu, H. ^{[1
]}

Sun, J. Z. ^{[2
]}

Katine, J. A. ^{[3
]}

Fullerton, E. E. ^{[4
]}

Mangin, S. ^{[5
]}

Kent, A. D. ^{[1
]}

机构：

[1] NYU, Dept Phys, New York, NY 10003 USA

[2] IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA

[3] Hitachi GST, San Jose Res Ctr, San Jose, CA 95135 USA

[4] Univ Calif San Diego, CMRR, La Jolla, CA 92093 USA

[5] Nancy Univ, IJL, CNRS, UMR 7198, F-54042 Vandoeuvre Les Nancy, France

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 26期

基金：

美国国家科学基金会;

关键词：

MAGNETIZATION REVERSAL; EXCITATIONS; NANOPILLARS; PARTICLE;

D O I：

10.1063/1.3532960

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of thermal fluctuations on spin-transfer switching has been studied for a broad range of time scales (subnanoseconds to seconds) in a model system, a uniaxial thin film nanomagnet. The nanomagnet is incorporated into a spin-valve nanopillar, which is subject to spin-polarized current pulses of variable amplitude and duration. Two physical regimes are clearly distinguished: a long pulse duration regime, in which reversal occurs by spin-transfer assisted thermal activation over an energy barrier, and a short-time large pulse amplitude regime, in which the switching probability is determined by the spin-angular momentum in the current pulse. (C) 2010 American Institute of Physics. [doi:10.1063/1.3532960]

引用

页数：3

共 18 条

[1] Spin-torque switching: Fokker-Planck rate calculation [J].