The theory of the Voigt effect in ferromagnetic materials

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Abstract
Linear magnetic birefringence in ferromagnetic thin films in the Voigt configuration leads to intensity modulation of the transmitted radiation during hard-axis switching. Errors in the classical theory proposed by Lissberger and Parker (1971) are corrected, and the revised theory is used to calculate the magnitude of this modulation and the magneto-optic parameters Q(=Q1-iQ2) and f(=f1-if2) used in the phenomenological description of this second-order magneto-optic effect. The results are, in general, at variance with previously reported values but are both self-consistent and in good agreement with the available experimental data.

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