Detection of current-induced resonance of geometrically confined domain walls

被引：87

作者：

Bedau, D.

Klaeui, M.

Krzyk, S.

Ruediger, U.

机构：

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

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

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.99.146601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic domain walls are found to exhibit quasiparticle behavior when subjected to geometrical variations. Because of the spin torque effect such a quasiparticle in a potential well is excited by an ac current leading to a dip in the depinning field at resonance for current densities as low as 2x10(10) A/m(2). Independently the resonance frequencies of transverse walls and vortex walls are determined from the dc voltage that develops due to a rectifying effect of the resonant domain wall oscillation. The dependence on the injected current density reveals a strongly nonharmonic oscillation.

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页数：4

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