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Photoinduced Magnetic Effects in YIG(Si)

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3 Author(s)
Gyorgy, E.M. ; Bell Telephone Laboratories, Incorporated, Murray Hill, New Jersey 07974, USA ; Dillon, J.F. ; Remeika, J.P.

This paper summarizes the recent investigations of photoinduced effects in magnetic materials. To date it has been shown that the uniaxial anisotropy, strain, linear dichroism, coercive force and initial permeability can be modified by infrared radiation. The theory interpreting the coercive force and permeability experiments differs from the model used to describe the first three effects and is not discussed here. The first three effects can be interpreted fairly well in terms of a model which has single Fe2+ ions preferentially occupying inequivalent octahedral sites. It is shown that with polarized light more than half of the available Fe2+ ions can be selectively moved among specific types of sites. Irradiation with unpolarized light essentially leads to a distribution appropriate for thermal equilibrium at the temperature of the sample.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:14 ,  Issue: 3 )