Ultrafast switching of a nanomagnet by a combined out-of-plane and in-plane polarized spin current pulse

被引：41

作者：

Lee, O. J. ^{[1
]}

Pribiag, V. S. ^{[1
]}

Braganca, P. M. ^{[1
]}

Gowtham, P. G. ^{[1
]}

Ralph, D. C. ^{[1
]}

Buhrman, R. A. ^{[1
]}

机构：

[1] Cornell Univ, Ithaca, NY 14853 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 01期

基金：

美国国家科学基金会;

关键词：

MAGNETIZATION REVERSAL; TRANSFER TORQUES; NANOPILLARS; DRIVEN;

D O I：

10.1063/1.3176938

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on spin valve devices that incorporate both an out-of-plane polarizer (OPP) to quickly excite spin torque (ST) switching and an in-plane polarizer/analyzer (IPP). For pulses <200 ps, we observe reliable precessional switching due largely to ST from the OPP. Compared to a conventional spin valve, for a given current amplitude from similar to 2 to 3 times the zero-thermal-fluctuation critical current (I-c0), the addition of the OPP can decrease the pulse width necessary for switching by a factor of 10 or more. The effect of the IPP also has beneficial ST consequences for the short pulse switching behavior. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3176938]

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页数：3

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