Microwave-Induced DC Response of Spin Wave Resonance Driven by an Anisotropic Built-In Field in a Permalloy Thin Strip

Author

Ziqian Wang ; Lujun Huang ; Xiaofeng Zhu ; Xiaoshuang Chen ; Wei Lu

Author_Institution

Nat. Lab. for Infrared Phys., Shanghai Inst. of Tech. Phys., Shanghai, China

Volume

50

Issue

5

fYear

2014

fDate

41760

Firstpage

1

Lastpage

4

Abstract

The microwave-induced dc response has been investigated in an in-plane magnetized permalloy strip. The spin wave resonances (SWRs) are observed. The SWR signals get anomalously suppressed when the direction of the specimen or the amplitude of the microwave frequencies is changed. Such suppression occurs at frequencies of less than 11 GHz, while the resonant field is as weak as less than 200 Oe. They are finally quantitatively interpreted by introducing an anisotropic built-in magnetic field that describes the shape anisotropy of the specimen.

Keywords

Permalloy; ferromagnetic resonance; magnetic anisotropy; magnetic thin films; spin waves; Ni₈₀Fe₂₀; SWR signal; anisotropic built-in field; in-plane magnetized permalloy strip; microwave frequency amplitude; microwave-induced dc response; shape anisotropy; spin wave resonance; thin films; Magnetic resonance; Magnetization; Microwave theory and techniques; Perpendicular magnetic anisotropy; Shape; Strips; Anisotropic magnetoresistance; magnetic anisotropy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2290100

Filename

6658972