| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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The subwavelength tuned magneto-optical Kerr effect in L10-FePt films with perpendicular magnetic anisotropy |
| Zhang Xia (张霞)a, Shi Lei (石磊)b, Li Jing (李晶)c, Xia Yun-Jie (夏云杰)a, Shi Zhong (时钟)d, Zhou Shi-Ming (周仕明)d |
a Shandong Province Key Laboratory of Laser Polarization and Information, Qufu Normal University, Qufu 273165, China;
b Surface Physics State Laboratory and Department of Physics, Fudan University, Shanghai 200433, China;
c Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China;
d School of Physics Science and Technology, Tongji University, Shanghai 200092, China |
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Abstract 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.
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Received: 10 March 2013
Revised: 27 May 2013
Accepted manuscript online:
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PACS:
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78.20.Ls
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(Magneto-optical effects)
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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75.70.-i
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(Magnetic properties of thin films, surfaces, and interfaces)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51171129) and the Shanghai Committee of Science and Technology, China (Grant No. 11JC1412700). |
Corresponding Authors:
Shi Zhong
E-mail: shizhong@tongji.edu.cn
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Cite this article:
Zhang Xia (张霞), Shi Lei (石磊), Li Jing (李晶), Xia Yun-Jie (夏云杰), Shi Zhong (时钟), Zhou Shi-Ming (周仕明) The subwavelength tuned magneto-optical Kerr effect in L10-FePt films with perpendicular magnetic anisotropy 2013 Chin. Phys. B 22 117803
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