Strong in-plane anisotropy of magneto-optical Kerr effect in corrugated cobalt films deposited on highly ordered two-dimensional colloidal crystals
Strong in-plane anisotropy of magneto-optical Kerr effect in corrugated cobalt films deposited on highly ordered two-dimensional colloidal crystals
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DOI：
10.1063/1.3544582
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发表时间：
2011-01
影响因子：
4
通讯作者：
Zhikun Han;J. Ai;P. Zhan;J. Du;H. Ding;Zhenlin Wang
中科院分区：
文献类型：
--
作者：
Zhikun Han;J. Ai;P. Zhan;J. Du;H. Ding;Zhenlin Wang
The corrugated cobalt films are investigated by magneto-optical Kerr effect and vibrating sample magnetometer (VSM). The films are fabricated by depositing thin cobalt layers on a large area single-domain two-dimensional (2D) hexagonal close-packing colloidal crystal. Strong in-plane anisotropy of the Kerr rotation hysteresis loop is found in sharp contrast to isotropic hysteresis loops obtained by the VSM. The anisotropy of such magneto-optical Kerr rotation disappears when randomly distributed colloidal spheres were used as the substrate. Our observations show that the magneto-optical effect does not completely correspond with the average magnetization state in such a 2D periodic magnetic network.
