Magnetic susceptibility measurements as a probe of spin transfer driven magnetization dynamics

被引：16

作者：

Lin, Weiwei ^{[1
]}

Cucchiara, J. ^{[1
]}

Berthelot, C. ^{[1
]}

Hauet, T. ^{[1
]}

Henry, Y. ^{[2
]}

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

Fullerton, Eric E. ^{[4
]}

Mangin, S. ^{[1
]}

机构：

[1] Nancy Univ, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France

[2] Univ Strasbourg, Inst Phys & Chim Mat Strasbourg, F-67037 Strasbourg, France

[3] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95135 USA

[4] Univ Calif San Diego, Ctr Magnet Recording Res, Dept Elect & Comp Engn, La Jolla, CA 92093 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 25期

关键词：

canted spin arrangements; magnetic susceptibility; nanostructured materials; perpendicular magnetic anisotropy; spin dynamics; spin valves; ASSEMBLED METALLIC NANOSTRUCTURES; MULTILAYER; EXCITATION; REVERSAL;

D O I：

10.1063/1.3454782

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An experimental technique has been developed to characterize spin-transfer driven magnetization dynamics. It was tested on a nanopillar spin valve with perpendicular anisotropy by measuring the nanopillar voltage under ac injected current (dV/dI), and ac magnetic field (dV/dH). Both the amplitude and the sign of the signals are different which reveals the different influences of the current and the field on the magnetization dynamics. Comparison between experiments and macrospin simulation shows that dV/dH measurements reveal the presence of a "canted state" demonstrating that dV/dH and dV/dI measurements are complementary techniques to probe magnetic states and their dynamics. (C) 2010 American Institute of Physics. [doi:10.1063/1.3454782]

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