Nonadiabatic Spin Transfer Torque in High Anisotropy Magnetic Nanowires with Narrow Domain Walls

被引：128

作者：

Boulle, O. ^{[1
]}

Kimling, J. ^{[1
]}

Warnicke, P. ^{[1
]}

Klaeui, M. ^{[1
,2
]}

Ruediger, U. ^{[1
]}

Malinowski, G. ^{[3
]}

Swagten, H. J. M. ^{[3
]}

Koopmans, B. ^{[3
]}

Ulysse, C. ^{[4
]}

Faini, G. ^{[4
]}

机构：

[1] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany

[2] Univ Konstanz, Zukunftskolleg, D-78457 Constance, Germany

[3] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands

[4] Lab Photon & Nanostruct, Phynano Team, CNRS, F-91460 Marcoussis, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.101.216601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Current induced domain wall (DW) depinning of a narrow DW in out-of-plane magnetized (Pt/Co)(3)/Pt multilayer elements is studied by magnetotransport. We find that for conventional measurements Joule heating effects conceal the real spin torque efficiency and so we use a measurement scheme at a constant sample temperature to unambiguously extract the spin torque contribution. From the variation of the depinning magnetic field with the current pulse amplitude we directly deduce the large nonadiabaticity factor in this material and we find that its amplitude is consistent with a momentum transfer mechanism.

引用

页数：4

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