Nonreciprocal Oersted field contribution to the current-induced frequency shift of magnetostatic surface waves

被引：17

作者：

Haidar, Mohammad ^{[1
,2
]}

Bailleul, Matthieu ^{[1
,2
]}

Kostylev, Mikhail ^{[3
]}

Lao, Yuyang ^{[3
,4
]}

机构：

[1] Univ Strasbourg, Inst Phys & Chim Mat Strasbourg IPCMS, F-67034 Strasbourg 2, France

[2] Univ Strasbourg, CNRS, NIE, UMR 7504, F-67034 Strasbourg 2, France

[3] Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia

[4] Univ Sci & Technol, Hefei, Peoples R China

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 09期

基金：

澳大利亚研究理事会;

关键词：

FERROMAGNETIC-FILMS; SPIN;

D O I：

10.1103/PhysRevB.89.094426

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of an electrical current on the propagation of magnetostatic surface waves is investigated in a relatively thick (40 nm) permalloy film both experimentally and theoretically. Contrary to previously studied thinner films where the dominating effect is the current-induced spin-wave Doppler shift, the magnetic field generated by the current ( Oersted field) is found to induce a strong nonreciprocal frequency shift which overcompensates the Doppler shift. The measured current-induced frequency shift is in agreement with the developed theory. The theory relates the sign of the frequency shift to the spin-wave modal profiles. The good agreement between the experiment and the theory confirms a recent prediction of a counterintuitive mode localization for magnetostatic surface waves in the dipole-exchange regime.

引用

页数：12

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