Magneto-Optics Features of Radiation Transitions of Non-Kramers Tm3+ Ion in Yttrium-Aluminum Garnet Crystals

doi:10.26565/2312-4334-2024-4-39

Furkat K. Turotov National university of Uzbekistan, named after Mirzo Ulugbek, Tashkent, Uzbekistan https://orcid.org/0000-0001-9008-4815
Mariya E. Malysheva National university of Uzbekistan, named after Mirzo Ulugbek, Tashkent, Uzbekistan https://orcid.org/0000-0002-4626-7398
Ramil R. Vildanov National university of Uzbekistan named after Mirzo Ulugbek, Tashkent, Uzbekistan https://orcid.org/0000-0001-5334-9909

DOI: https://doi.org/10.26565/2312-4334-2024-4-39

Keywords: Thulium-yttrium garnet, Rare-earth ions, Magneto-optical properties, Luminescence, Energy levels, Magnetic circular polarization

Abstract

The spectra of luminescence and magnetic circular polarization of a single crystal of thulium-yttrium garnet-aluminate Tm³⁺:YAG have been studied within the visible spectral range at a temperature of 90 and 300 K in a magnetic field of 10 kOe. Based on the analysis of optical and magneto-optical data, the presence of "quasi-degenerate" states of excited multiplets ¹D₂,³F₄,³G₄ and the ground multiplet ³H₆ of the Tm³⁺RE ion in garnet-aluminate YAG at the radiative transitions ¹G₄→³H₆, ¹D₂→³F₄ and ¹D₂→³F₃ has been determined. The effect of quantum mechanical “mixing” plays a significant role in the occurrence of magneto-optical effects on luminescence bands caused by “forbidden” 4f→4f transitions in the non-Kramers Tm³⁺ ion having a “quasi-doublet” structure in the energy spectra.

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