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The role of the exchange coupling and applied field strength in the magneto-optical effects of magnetic insulators

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Zhang,  F.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Xu,  Y.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Guillot,  M.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Yang, J. H., Zhang, F., Xu, Y., & Guillot, M. (2002). The role of the exchange coupling and applied field strength in the magneto-optical effects of magnetic insulators. Journal of Applied Physics, 91(10), 7299-7301.


Cite as: https://hdl.handle.net/21.11116/0000-000E-EE11-3
Abstract
A theoretical investigation on the role of some microscopic
parameters in the Faraday rotation (Fr) in paramagnetic and
ferrimagnetic insulators is presented. Fr scales linearly with
the exchange interaction and applied magnetic field H in a wide
range. However, the Fr magnitude approaches saturation and then
decreases as the exchange interaction continues to increase.
The distinction between the spontaneous Fr and H-induced Fr is
explained. The interesting difference between the dependency of
Fr in 3d metals on the spin-orbit (SO) coupling strength and
the similar dependency in rare earth (RE) compounds is studied.
It is related to the relatively weak crystal field and exchange
interaction and the relatively strong SO coupling in the RE
compounds compared with the 3d metals. (C) 2002 American
Institute of Physics.