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Enhancement of the Magneto-Optical Kerr Rotation at Short Wavelength in Sputtered Ag/TbFeCo Bilayer Films |
| GAO Xiao-Yong1;ZHANG Jin-Min2;WANG Song-You3;CHEN Liang-Yao3 |
| 1The Key Laboratory of Materials Physics of Ministry of Education, Zhengzhou University, Zhengzhou 450052
2Department of Physics, Guizhou University, Guiyang 550025
Department of Optical Science and Engineering, Fudan University, Shanghai 200433 |
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| Cite this article: |
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GAO Xiao-Yong, ZHANG Jin-Min, WANG Song-You et al 2005 Chin. Phys. Lett. 22 701-704 |
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Abstract The magneto-optical Kerr rotation is enhanced at short wavelengths in sputtered Ag/TbFeCo bilayer films in which Ag not only acts as a protecting layer against the oxidation of TbFeCo, but also induces the enhancement of the magneto-optical Kerr rotation at short wavelengths. The enhancement of the Kerr rotation of Ag/TbFeCo bilayer films is not mainly due to the low optical constant of Ag near its plasma absorption edge and the interference effect occurring at the interface between Ag and TbFeCo, but due to the polarization of Ag d electrons caused by the ferromagnetic TbFeCo layer, which causes the off-diagonal elements of dielectric constant tensor of Ag/TbFeCo to be greatly increased.
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| Keywords:
78.20.Ls
75.70.Ak
75.50.Kj
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Published: 01 March 2005
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| PACS: |
78.20.Ls
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(Magneto-optical effects)
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75.70.Ak
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(Magnetic properties of monolayers and thin films)
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75.50.Kj
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(Amorphous and quasicrystalline magnetic materials)
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