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Analysis on magnetic field dependence of magneto-optical Faraday effect

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2 Author(s)
Wei Wang ; Department of Physics and Electronics, School of Science, Beijing University of Chemical Technology, Beijing 100029, China ; Liu, Gongqiang

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2951918 

In this paper, the complicated relations between Faraday rotation and external magnetic field in various circumstances are theoretically deduced using magneto-optical four-level model. A linear field dependence of the Faraday rotation in extremely strong magnetic field or at high temperatures is revealed. Our theory also shows that the Faraday rotation presents an obvious nonlinear field-dependence property in a general magnetic field and at low temperatures. Furthermore, this nonlinear relationship can be simply described as θFFs+aHe+bHe2. In addition, a fit to the experimental results in Dy3-xBixFe5O12 (Bi-DyIG) under different magnetic fields is obtained. Meanwhile, it is pointed out that the parameters V1 and V2 have the anisotropy and temperature-dependence characteristic, which will also result in the anisotropic and temperature properties of magneto-optical Faraday effect in Bi-DyIG.

Published in:

Journal of Applied Physics  (Volume:104 ,  Issue: 1 )