| Original Articles |
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Annealing Effects on Properties of Bi-Substituted Garnet Films with Perpendicular Anisotropy Prepared by a Sol-Gel Method |
| ZHANG Yue-Pin1,2;WANG Xian-Ying1;Ruan Hao1;SHEN De-Fang1;GAN Fu-Xi1 |
| 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Laboratory of Photo-Electronic Material, Ningbo University, Ningbo 315211
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| Cite this article: |
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ZHANG Yue-Pin, WANG Xian-Ying, Ruan Hao et al 2003 Chin. Phys. Lett. 20 746-748 |
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Abstract Bi-substituted garnet films with perpendicular anisotropy have been prepared by a sol-gel method. Annealing effects on magneto-optical properties and structures of the films are studied. The results indicate that the Kerr hysteresis loops of garnet films have good squareness at annealing temperatures above 650°C, the coercive force Hc of these films increases from 1070 to 1570 Oe with the increasing temperature from 650°C to 700°C. The Kerr rotation of the films was changed with the increasing annealing temperature, and there is a maximum value (0.82°C) at 675°C. It was found that the structure of the films is a single phase of garnet without preferring orientation when the annealing temperature is about 650°C, but a new phase (Bi2Al4O9) can be formed when the annealing temperature reaches 675°C, another new phase (Bi2Fe4O9) appears when the annealing temperature is about 700°C.
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| Keywords:
75.50.Gg
75.30.Gw
75.60.Nt
75.60.Ej
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Published: 01 May 2003
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| PACS: |
75.50.Gg
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(Ferrimagnetics)
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75.30.Gw
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(Magnetic anisotropy)
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75.60.Nt
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(Magnetic annealing and temperature-hysteresis effects)
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75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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