Liang JH, Xiao X, Li JX, Zhu BC, Zhu J, Bao H, Zhou L, Wu YZ. Quantitative study of the quadratic magneto-optical Kerr effects in Fe films.
OPTICS EXPRESS 2015;
23:11357-11366. [PMID:
25969230 DOI:
10.1364/oe.23.011357]
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Abstract
We present a rotating field method to separate the linear and quadratic magneto-optical Kerr effects (LMOKE and QMOKE) in Fe/GaAs(001) films. The LMOKE is isotropic in crystal orientation, while the QMOKE has both isotropic and anisotropic contributions. The experimental observation is well explained by Yeh's 4×4 matrix formalism. We also report the incident angle and the thickness dependences of the LMOKE and QMOKE, and extract the material's index of refraction n and the magneto-optical coupling constant K and G. The study gives a full description of the Kerr effect in Fe films, and the proposed method can be applied to other magneto-optical coupling systems.
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