Magneto-Optics of Dy3+ Ion in Low-Symmetric Orthoaluminate Structure

• Published in: Crystallography reports 2023-12, Vol.68 (7), p.1180-1189
• Main Authors: Valiev, U. V., Malysheva, M. E., Pelenovich, V. O., Ramazanov, A. X., Turotov, F. K., Karimov, D. N.
• Format: Article
• Language: English
• Subjects: Crystallography; Crystallography and Scattering Methods; Dysprosium; Faraday effect; Magnetic permeability; Magneto-optics; Physical Properties of Crystals; Physics; Physics and Astronomy; Rare earth elements; Single crystals; Symmetry; Verdet constant
• ISSN: 1063-7745; 1562-689X
• DOI: 10.1134/S1063774523600710

Magnetic susceptibility and the Faraday effect in orthorhombic DyAlO 3 single crystals were studied along the crystallographic b -axis, the axis of easy magnetization, in a temperature range 78–300 K. The Faraday rotation was measured on the basis of the temperature and spectral dependencies of the rotation angles θ of the major axis of the ellipse of light radiation polarization in a wavelength range 440–750 nm. At a wavelength of 506 nm, the dependence of the Verdet constant V on the magnetic susceptibility χ M was observed to be linear in a temperature range 85–300 K, and the paramagnetic Verdet constant C p was calculated. A comparative analysis of the constants C p and the effective frequencies ω 0 of allowed transitions in cubic R 3 Al 5 O 12 garnets and R AlO 3 ( R = Tb 3+ , Dy 3+ ) orthoaluminate crystals was carried out in terms of the local site symmetry for rare-earth ions. The possibility of practical magneto-optical applications of the DyAlO 3 crystals is briefly discussed.