Domain-Wall Depinning Assisted by Pure Spin Currents

被引：39

作者：

Ilgaz, D. ^{[1
]}

Nievendick, J. ^{[1
]}

Heyne, L. ^{[1
]}

Backes, D. ^{[1
,2
]}

Rhensius, J. ^{[1
,2
]}

Moore, T. A. ^{[1
]}

Nino, M. A. ^{[3
]}

Locatelli, A. ^{[3
]}

Mentes, T. O.

v. Schmidsfeld, A. ^{[1
]}

v. Bieren, A. ^{[1
]}

Krzyk, S. ^{[1
]}

Heyderman, L. J. ^{[2
]}

Klaeui, M. ^{[1
]}

机构：

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

[2] Paul Scherrer Inst, Lab Micro & Nanotechnol, CH-5232 Villigen, Switzerland

[3] Sincrotrone Trieste SCPA, I-34149 Trieste, Italy

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 07期

关键词：

GIANT MAGNETORESISTANCE; DIFFUSION LENGTH; ROOM-TEMPERATURE; MAGNETIZATION; DYNAMICS; ACCUMULATION; PERMALLOY; INJECTION; EXCHANGE; VALVE;

D O I：

10.1103/PhysRevLett.105.076601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the depinning of domain walls by pure diffusive spin currents in a nonlocal spin valve structure based on two ferromagnetic Permalloy elements with copper as the nonmagnetic spin conduit. The injected spin current is absorbed by the second Permalloy structure with a domain wall, and from the dependence of the wall depinning field on the spin current density we find an efficiency of 6 x 10(-14) T/(A/m(2)), which is more than an order of magnitude larger than for conventional current induced domain-wall motion. Theoretically we find that this high efficiency arises from the surface torques exerted by the absorbed spin current that lead to efficient depinning.

引用

页数：4

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