Extended magneto optic method to explore the longitude magneto optic Kerr effect of the magnetic ultrathin film grown on optically anisotropic substrate

作者：Chang Lin^*; Lian Jie; Wang Xiao; Sun Zhaozong

来源：Journal of Magnetism and Magnetic Materials, 2013, 333: 114-123.

DOI：10.1016/j.jmmm.2012.12.024

• MOKE
• Optically anisotropy
• Substrate

The traditional magneto optic Kerr effect (MOKE) method is extended and the new method can be applied to investigate the magnetic properties of magnetic ultrathin film even multilayer containing anisotropic optical medium as long as we choose a proper coordinate system. Based on this method, any interface structure-magnetic ultrathin film grown on optically anisotropic substrate-can be explored by MOKE. The computer simulation shows relation between longitude Kerr rotation and incident angle. A further analysis indicates that the three elements of dielectric tensor of the anisotropic substrate play different roles in determining the relation between Kerr rotation and incident angle. Besides, the influence of the three dielectric constants of the substrate on the Kerr rotation is also found and parameters of special crystals have been taken into simulation to find the error ratio that the traditional method results for multilayer containing anisotropic optical substrate. These results show that the extended method can enhance the accuracy of measurement and help us to choose proper substrate for the ultrathin magnetic films when using MOKE to explore them.

• 出版日期2013-5
• 单位山东大学