Radiation of spin waves from the open end of a microscopic magnetic-film waveguide

被引：67

作者：

Demidov, Vladislav E. ^{[1
]}

Demokritov, Sergej O. ^{[1
]}

Birt, Daniel ^{[2
,3
]}

O'Gorman, Brian ^{[2
]}

Tsoi, Maxim ^{[2
,3
]}

Li, Xiaoqin ^{[2
,3
]}

机构：

[1] Univ Munster, Inst Phys Appl, D-48149 Munster, Germany

[2] Univ Texas Austin, Dept Phys, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA

[3] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 01期

关键词：

magnetic anisotropy; magnetic thin films; magnetisation; Permalloy; spin waves; waveguides; BRILLOUIN LIGHT-SCATTERING;

D O I：

10.1103/PhysRevB.80.014429

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied experimentally the radiation of spin waves from a permalloy-film microwaveguide into a continuous permalloy film. We show that due to a strong mismatch of the spin-wave spectrum caused by a variation in the demagnetizing field at the interface between the waveguide and the film, a frequency interval exists, where spin waves experience total reflection from the junction penetrating into the permalloy film in a tunnelinglike manner. At frequencies above this interval, complex frequency-dependent radiation patterns were observed characterized by a preferential radiation direction appearing due to the intrinsic anisotropy of the spin-wave dispersion characteristics in the film.

引用

页数：5

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