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Photo-Induced Magnetic Anisotropy of Polymer Film Containing Azobenzene Organic Free Radical Group |
| XU Ze-Da;ZHANG Yong;CHEN Xiao-Fang; FAN Xing-He;WAN Xin-Hua;ZHOU Qi-Feng |
| Department of Polymer Science and Engineering, College of Chemistry, Peking University, Beijing 100871 |
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| Cite this article: |
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XU Ze-Da, ZHANG Yong, CHEN Xiao-Fang et al 2003 Chin. Phys. Lett. 20 240-242 |
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Abstract The forward degenerate four-wave mixing geometry was employed to induce microstructure in an organic free radical azobenzene polymer film. Before irradiated with Ar+ laser beams (λ =514.5 nm), the azobenzene organic free radical polymer exhibits magnetic isotropic measured by superconducting quantum interference device. After photo-induced microstructure, the polymer film becomes magnetic anisotropy. When the applied magnetic field H = 50 Gauss, the magnetization along the normal direction of the polymer film is Mz = 5.5 x 10-5 emu/g, which is larger than Mx = 4.1 x 10-5 emu/g in the direction parallel to the polymer film.
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| Keywords:
42.65.Hw
42.65.-k
42.65.Sf
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Published: 01 February 2003
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| PACS: |
42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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42.65.-k
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(Nonlinear optics)
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42.65.Sf
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(Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)
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