Open AccessMeasurement of magnetic anisotropyby ferromagnetic resonance
Author(s) -
Gu Wen-Juan,
Jing Pan,
Wei Du,
Hu Jia
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.057601
Subject(s) - condensed matter physics , magnetocrystalline anisotropy , ferromagnetic resonance , ferromagnetism , antiferromagnetism , materials science , bilayer , magnetic anisotropy , exchange bias , anisotropy , resonance (particle physics) , magnetic field , nuclear magnetic resonance , physics , magnetization , chemistry , optics , atomic physics , biochemistry , membrane , quantum mechanics
The effective magnetic field caused by exchange coupling between a ferromagnetic and an antiferromagnetic bilayer and its magnetic anisotropy have been investigated by means of ferromagnetic resonance. It was shown that the exchange bias phenomenon occurrence and its positive or negative characteristic for ferromagnetic/antiferromagnetic bilayer can be identified from its magnetic resonance spectrum. In addition, when the field was applied along different crystalline directions, the behavior of magnetic resonance field will be changed, and is closely dependent on the magnetocrystalline anisotropy and unidirectional anisotropy induced by the interface coupling in ferromagnetic/antiferromagnetic bilayer. Anomalies in the ferromagnetic resonance frequency studied as functions of applied field, including its orientation and strength, are interpreted as evidence for the four fold anisotropy and unidirectional anisotropy. Our conclusions are in good agreement with the related experiments.