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EPR of trivalent iron centers in a BaF2: Fe crystal

  • Defects and Impurity Centers, Dislocations, and Physics of Strength
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Abstract

An orthorhombic paramagnetic Fe3+ ion center (concentration of iron ions is 0.1 at. %) was found using EPR in BaF2: Fe crystals irradiated by x rays. The EPR spectra recorded in the Q range at a temperature T = 77 K exhibit both the fine structure typical of a center with effective spin S = 5/2 and a superhyperfine structure (SHFS) indicating the SHFS interaction of the electronic moment of the center with the nuclear magnetic moments of its six ligands (F− ions). An analysis of the SHFS reveals that this center forms through the replacement of a Ba2+ cation by a Fe2+ cation, which transforms into a Fe3+ (6 A 1g ) cation under x-ray irradiation and shifts into a neutral position along the C2 axis of the cubic coordination shell of the replaced host cation.

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Authors and Affiliations

  1. Zavoĭskiĭ Physicotechnical Institute, Russian Academy of Sciences, Sibirskiĭ Trakt ul. 10/7, Kazan, 420029, Russia

    E. R. Zhiteĭtsev, V. A. Ulanov, M. M. Zaripov & E. P. Zheglov

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  1. E. R. Zhiteĭtsev
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  2. V. A. Ulanov
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  3. M. M. Zaripov
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  4. E. P. Zheglov
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Original Russian Text © E.R. Zhiteĭtsev, V.A. Ulanov, M.M. Zaripov, E.P. Zheglov, 2006, published in Fizika Tverdogo Tela, 2006, Vol. 48, No. 10, pp. 1779–1783.

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Zhiteĭtsev, E.R., Ulanov, V.A., Zaripov, M.M. et al. EPR of trivalent iron centers in a BaF2: Fe crystal. Phys. Solid State 48, 1887–1892 (2006). https://doi.org/10.1134/S1063783406100118

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  • DOI: https://doi.org/10.1134/S1063783406100118

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