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Low temperature evolution of the Faraday rotation in samarium iron garnet

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3 Author(s)
Guillot, M. ; CNRS, Laboratoire Louis Néel, BP, Grenoble,France ; Le Gall, H. ; Marchand, A.

Faraday rotation (FR) measurements performed On single crystal Samarium Iron Garnet (SmIG) at 1.15 µm wavelength are presented under a magnetic field up to 20 kOe applied along the [111] direction in the 10.5-300 K temperature range. At 60 K when the first order magneto-structural phase rotation ( \langle 111 \rangle \buildrel\rightarrow\over\leftarrow \langle 110 \rangle ) takes place, an abrupt change of the F.R. is observed. The results are analyzed using different theoretical models with a special attention to the crossover point where the Sm3+sublattice magnetization becomes equal to zero.

Published in:

Magnetics, IEEE Transactions on  (Volume:22 ,  Issue: 5 )