Photoinduction and relaxation of linear birefringence in manganese-germanium garnets
V. A. BedarevB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, 310164 KharkovS. L. GnatchenkoB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, 310164 Kharkov
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The processes of induction of linear birefringence by light and its relaxation are studied in tetragonal Ca3Mn2Ge3O12 and cubic Cd3Mn2Ge3O12 manganese-germanium garnets. It is shown that the time dependences Δn(t) of the photo-induced birefringence measured during induction and relaxation of the effect are nonexponential in nature and are described by the law exp[−(t/τ)β] which takes into account the dispersion of characteristic times τ for these processes.
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