Magneto-optical properties of the BiIG/GGG/SiO2 heterostructure around the magnetic compensation point

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Abstract

The results of Faraday effect and magnetic circular dichroism study in BiIG/GGG/SiO2 heterostructure are presented. The heterostructure consists of nanometer-thick layers of Bi3Fe5O12 (BiIG) iron garnet and Gd3Ga5O12 (GGG) paramagnetic garnet synthesized on SiO2 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 Fe3+ 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.

About the authors

A. S. Fedorov

Kotelnikov Institute of Radioengineering and Electronics RAS; Moscow Institute of Physics and Technology (National Research University)

Email: fedorov_a_s@inbox.ru
Mokhovaya Str., 11, bld. 7, Moscow, 125009 Russian Federation; Institutskiy per., 9, Dolgoprudny, Moscow Region, 141700 Russian Federation

S. A. Nikitov

Kotelnikov Institute of Radioengineering and Electronics RAS; Moscow Institute of Physics and Technology (National Research University)

Mokhovaya Str., 11, bld. 7, Moscow, 125009 Russian Federation; Institutskiy per., 9, Dolgoprudny, Moscow Region, 141700 Russian Federation

M. V. Logunov

Kotelnikov Institute of Radioengineering and Electronics RAS; Moscow Institute of Physics and Technology (National Research University); National Research University Higher School of Economics

Mokhovaya Str., 11, bld. 7, Moscow, 125009 Russian Federation; Institutskiy per., 9, Dolgoprudny, Moscow Region, 141700 Russian Federation; Pokrovsky Boulevard, 11, Moscow, 109028 Russian Federation

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