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EPR,ENDOR and optical spectroscopy of Yb3+ ion in KZnF3 single crystals
Institution:1. Kazan Zavoisky Physical-Technical Institute, 420029 Kazan, Russian Federation;2. Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation;3. South Westphalia University of Applied Sciences, Department of Electrical Engineering, 59494 Soest, Germany;4. University of Paderborn, Department of Physics, 33098 Paderborn, Germany;1. Centro de Lasers e Aplicações, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Butantã, P.O. Box 11049, São Paulo, SP o5422-970, Brazil;2. Departamento de Ciências dos Materiais, Instituto de Pesquisas Energéticas e Nucleares, Brazil;1. Institute of Physics, Kazimierz Wielki University in Bydgoszcz, Powstancow Wielkopolskich, 2, 85-090 Bydgoszcz, Poland;2. Laboratory of Optoelectronic Materials (LOM), Ivan Franko National University of Lviv, Gen. Tarnavsky Str. 107, 79017 Lviv, Ukraine;3. Department of Materials Sciences 6, University of Erlangen-N?rnberg, Martensstrasse 7, D-91058 Erlangen, Germany;1. School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China;2. Institute of Electrophysics of the Ural Branch of Russian Academy of Sciences, Ekaterinburg, 620016, Russia;3. Ural Federal University, Ekaterinburg, 620002, Russia;1. Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;2. Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan;3. Graduate School of Science and Engineering, Ehime University, Matsuyama, Ehime 790-8577, Japan
Abstract:The paramagnetic center of tetragonal symmetry formed by the Yb3+ ion in the KZnF3 crystal has been studied using methods of EPR, ENDOR and optical spectroscopy. The location of the impurity ion and the structural model of the complex differing from the model of the Yb3+ center in KMgF3 have been established. The empirical scheme of the energy levels of the Yb3+ ion has been found. The parameters of its interaction with the crystal electrostatic field and the hyperfine interaction with ligands of the nearest environment have been determined. The parameters of the crystal field were used for the analysis of the distortions of the crystal lattice in the vicinity of Yb3+. The parameters of the transferred hyperfine interaction have been calculated for the distances between Yb3+ and F? ions of the nearest environment obtained taking into account the found distortions. They are in good agreement with the experimental values.
Keywords:D  Crystal structure  D  Electron paramagnetic resonance (EPR)  D  Magnetic properties  D  Optical properties
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