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Study of the Structures of the Tetragonal Paramagnetic Centers in the Mixed Fluorite Crystals with Rare-Earth Ions by EPR

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Abstract

Electron paramagnetic resonance (EPR) of the mixed fluorite crystals with the general formula (MeF2)1−x−y (REF3) x (RF3) y (Me = Ca, Sr, Ba; R = Y, La, Lu; RE—paramagnetic trivalent rare-earth ions) were studied comprehensively by different authors and several structural models of paramagnetic centers were considered. However, a lot of details of EPR spectra still remain unexplained. In this work some modifications of the simplest models are proposed which allow explaining adequately the variety of the tetragonal centers in crystals grown under the different conditions. The calculated from the proposed models components of g-factors for Ce3+, Nd3+, Sm3+, Er3+ ions are in a good agreement with the experimental values.

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Acknowledgments

This work was funded by the subsidy allocated to Kazan Federal University for the state assignment in the sphere of scientific activities. M.R.G. also acknowledges the subsidy of the Russian Government to support the Program of competitive Growth of Kazan Federal University among World’s Leading Academic Centers. The measurements were done on the equipment of the Center of the Shared Facilities of Kazan Federal University.

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Authors and Affiliations

  1. Institute of Physics, Kazan Federal University, 420008, Kazan, Russia

    L. K. Aminov, M. R. Gafurov, I. N. Kurkin & A. A. Rodionov

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  1. L. K. Aminov
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  2. M. R. Gafurov
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  3. I. N. Kurkin
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  4. A. A. Rodionov
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Correspondence to M. R. Gafurov.

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Aminov, L.K., Gafurov, M.R., Kurkin, I.N. et al. Study of the Structures of the Tetragonal Paramagnetic Centers in the Mixed Fluorite Crystals with Rare-Earth Ions by EPR. Appl Magn Reson 45, 1147–1156 (2014). https://doi.org/10.1007/s00723-014-0564-0

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