Anisotropic behaviour of the faraday rotation in erbium iron garnet |
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| Authors: | P. Feldmann H. Le Gall M. Guillot A. Marchand |
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| Affiliation: | CNRS Laboratoire de Magnétisme et d''Optique des Solides, 92190 Meudon-Bellevue, France;CNRS Laboratoire Louis Néel, Associé à l''USMG, B.P. 166 X 38042 Grenoble-Cedex, France |
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| Abstract: | Faraday rotation (FR) measurements performed on single crystals Erbium Iron Garnet (ErIG) at 1.15 μm wavelength are presented in a magnetic field up to 20 kOe applied along the three main crystallographic directions. Spontaneous FR and FR susceptibilities are found to be anisotropic. The results are discussed in terms of electric and magnetic dipole transitions and compared to the magnetic anisotropy. A strong anisotropy of the first order electric dipole coefficient of the Er3+ ion is evidenced at low temperature (below 30 K). |
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