Abstract
In this article, we theoretically investigate the magnetic and magneto-optical properties of Nd3Ga5O12 in high magnetic fields (up to 35 T). Here, in view of the antiferromagnetism below the Néel temperature, a particular consideration of two magnetic sublattices A and B in Nd3Ga5O12 is presented. Taking account of the indirect exchange interaction, the complicated nonlinearity of magnetization (M) with the external magnetic field (He) is quantitatively described. In addition, we detailedly deduce the relation of Faraday rotation (θF) with the external magnetic fields. In our theoretical model, it is emphasized that θF strongly depends on the magnetization of the two different magnetic sublattices (MA and MB) and He. Referring to the values of MA and MB, the Faraday rotations are simulated at four different wavelengths in Nd3Ga5O12. Our theoretical results can excellently fit the experimental work by Guillot.
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