Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2290100