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Anomalies in the magnetic properties of copper impurity clusters in barium fluoride crystals

  • Defects, Dislocations, and Physics of Strength
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Abstract

Copper impurity trimers with antiferromagnetic coupling between Cu2+ ions are synthesized in BaF2 crystals. In some of the BaF2: Cu crystals thus prepared, the concentration of copper stable trimers turns out to be higher than that of copper dimers and copper single centers. The BaF2: Cu crystals are studied using electron paramagnetic resonance (EPR) spectroscopy at frequencies of 9.3, 23.0, and 37.0 GHz in the temperature range 4.2–77 K. It is found that the components of the effective tensor g for copper trimers depend strongly on the external magnetic field and temperature. A static model of the molecular structure of the copper trimer is proposed on the basis of the experimental data obtained.

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Authors and Affiliations

  1. Kazan Physicotechnical Institute, Russian Academy of Sciences, Sibirskii trakt 10/7, Kazan 29, 420029 Tatarstan, Russia

    V. A. Ulanov, M. M. Zaripov & I. I. Fazlizhanov

Authors
  1. V. A. Ulanov
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  2. M. M. Zaripov
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  3. I. I. Fazlizhanov
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__________

Translated from Fizika Tverdogo Tela, Vol. 47, No. 9, 2005, pp. 1596–1601.

Original Russian Text Copyright © 2005 by Ulanov, Zaripov, Fazlizhanov.

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Ulanov, V.A., Zaripov, M.M. & Fazlizhanov, I.I. Anomalies in the magnetic properties of copper impurity clusters in barium fluoride crystals. Phys. Solid State 47, 1655–1661 (2005). https://doi.org/10.1134/1.2045348

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  • DOI: https://doi.org/10.1134/1.2045348

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