Determination of the magnetic anisotropy constant of Cu/Fe/SiO2/Si by a magneto-optical Kerr effect susceptometer

doi:10.1088/1674-1056/23/1/017502

Abstract The magneto-optical Kerr effect susceptometry technique is proposed to determine the uniaxial magnetic anisotropy (UMA) constant K_u. The magnetic properties of Cu/Fe/SiO₂/Si grown by dc magnetron sputtering were investigated. The in-plane uniaxial magnetic anisotropy was probed by the magneto-optical Kerr effect (MOKE). The value of UMA, K_u=2.5×10³ J/m³, was simulated from the field dependence of ac susceptibility along the hard axis according to the Stoner–Wohlfarth (S–W) model, which is consistent with K_u=2.7×10³ J/m³ calculated from the magnetic hysteresis loops. Our results show that the magneto-optical Kerr effect susceptometry can be employed to determine the magnetic anisotropy constant owing to its high sensitivity.

Keywords: ac susceptibility magnetic anisotropy magneto-optical Kerr effect susceptometry

Received: 25 June 2013
Revised: 29 August 2013
Accepted manuscript online:

PACS:	75.30.Gw	(Magnetic anisotropy)
	75.50.Bb	(Fe and its alloys)
	75.30.Cr	(Saturation moments and magnetic susceptibilities)
	75.60.Jk	(Magnetization reversal mechanisms)

Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2009CB929201, 2011CB921801, and 2012CB933102) and the National Natural Science Foundation of China (Grant Nos. 50931006, 11034004, 51021061, and 11274033).

Corresponding Authors: Cheng Zhao-Hua
E-mail: zhcheng@iphy.ac.cn

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Jia Yi-Jiao (贾义娇), He Wei (何为), Ye Jun (叶军), Hu Bo (胡泊), Chen Zi-Yu (陈子瑜), Gao You-Hui (高有辉), Zhang Xiang-Qun (张向群), Yang Hai-Tao (杨海涛), Cheng Zhao-Hua (成昭华) Determination of the magnetic anisotropy constant of Cu/Fe/SiO₂/Si by a magneto-optical Kerr effect susceptometer 2014 Chin. Phys. B 23 017502

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Determination of the magnetic anisotropy constant of Cu/Fe/SiO2/Si by a magneto-optical Kerr effect susceptometer

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Determination of the magnetic anisotropy constant of Cu/Fe/SiO₂/Si by a magneto-optical Kerr effect susceptometer