Specific features of optical absorption in rare-earth orthoaluminate DyAlO3
U. V. ValievPhysical Faculty, National University of Uzbekistan, Tashkent, 700174, UzbekistanJohn B. GruberSan José State University, San José California, 95192-0106, USASh. A. RakhimovPhysical Faculty, National University of Uzbekistan, Tashkent, 700174, Uzbekistan
ABI
Аннотация
Polarization spectra of optical absorption of the 4f-4f transition 6 H 15/2 → 6 F 3/2 in the rare-earth orthoaluminate DyAlO3 are theoretically and experimentally studied at the temperature T=78 K. It is shown that the nontrivial character of the anisotropy of the polarization absorption spectra at low temperatures can be explained by the J-J mixing of excited multiplets of the 4f 9 configuration of Dy3+ ions in a low-symmetry crystal field of the orthoaluminate structure. The energy and wave functions of the Stark sublevels within the excited 6 F 5/2 multiplet in the 4f 9 configuration of the Dy3+ rare-earth ion in the crystal field of C s symmetry are numerically calculated.
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