title: Quantitative study of the quadratic magneto-optical Kerr effects in Fe films.
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.
authors.forename: J H
authors.initials: JH
authors.lastname: Liang
authors.forename: X
authors.initials: X
authors.lastname: Xiao
authors.forename: J X
authors.initials: JX
authors.lastname: Li
authors.forename: B C
authors.initials: BC
authors.lastname: Zhu
authors.forename: J
authors.initials: J
authors.lastname: Zhu
authors.forename: H
authors.initials: H
authors.lastname: Bao
authors.forename: L
authors.initials: L
authors.lastname: Zhou
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Wu