The subwavelength tuned magneto-optical Kerr effect in L1_0-FePt films with perpendicular magnetic anisotropy  

作　　者：张霞 石磊 李晶 夏云杰 时钟 周仕明 

机构地区：[1]Shandong Province Key Laboratory of Laser Polarization and Information, Qufu Normal University [2]Surface Physics State Laboratory and Department of Physics, Fudan University [3]Department of Optical Science and Engineering, Fudan University [4]School of Physics Science and Technology, Tongji University

出　　处：《Chinese Physics B》2013年第11期599-602,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.51171129);the Shanghai Committee of Science and Technology,China(Grant No.11JC1412700)

摘　　要：For L10-FePt films with strong perpendicular anisotropy covered by arrays of hexagonal close-packed polystyrene spheres （PSSs）, fine structures are observed in magneto-optical Kerr rotation spectra in the visible spectral range. The reflection minima are found to be located at the same wavelengths as the Kerr rotation peaks. The Kerr rotation enhancement is attributed to the excitation of both the surface plasmon polariton in the dielectric PSS/metal interface and the guide waves （guide mode） in the PSS array. The two-dimensional PSSs/SiO2/FePt system exhibiting a tunable magneto-optical Kerr effect and a high perpendicular magnetic anisotropy will be helpful for designing and fabricating magneto-optics devices.For L10-FePt films with strong perpendicular anisotropy covered by arrays of hexagonal close-packed polystyrene spheres （PSSs）, fine structures are observed in magneto-optical Kerr rotation spectra in the visible spectral range. The reflection minima are found to be located at the same wavelengths as the Kerr rotation peaks. The Kerr rotation enhancement is attributed to the excitation of both the surface plasmon polariton in the dielectric PSS/metal interface and the guide waves （guide mode） in the PSS array. The two-dimensional PSSs/SiO2/FePt system exhibiting a tunable magneto-optical Kerr effect and a high perpendicular magnetic anisotropy will be helpful for designing and fabricating magneto-optics devices.

关 键 词：L10-FePt magneto-optical Kerr effect surface plasma polariton guide mode 

分 类 号：O484[理学—固体物理]