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Anisotropic behaviour of the faraday rotation in erbium iron garnet

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
30
Issue
1
Identifiers
DOI: 10.1016/0304-8853(82)90015-4

Abstract

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 Er 3+ ion is evidenced at low temperature (below 30 K).

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