Observational analysis reveals significant magneto-optical effects at the compensation point in BiIG/GGG/SiO, indicating ion diffusion mechanisms.
The results of Faraday effect and magnetic circular dichroism study in BiIG/GGG/SiO heterostructure are presented. The heterostructure consists of nanometer-thick layers of BiFeO (BiIG) iron garnet and GdGaO (GGG) paramagnetic garnet synthesized on SiO quartz substrate. It is shown that a magnetic compensation point arises in the BiIG layer due to ion diffusion at the BiIG/GGG interface. The specific features of diamagnetic transitions, caused by the presence of Fe ions in different sublattices of the iron garnet and responsible for magneto-optical effects, are investigated around the magnetic compensation point. A sharp change in the energy of diamagnetic transitions is observed across the compensation point.
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A.S. Fedorov (2025) studied this question.
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