Detection of current-induced resonance of geometrically confined domain walls

被引：88
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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