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Anisotropic exchange interactions in CuTe2O5

  • Magnetism and Ferroelectricity
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Abstract

Electron paramagnetic resonance (EPR) was used to study CuTe2O5 single crystals at frequencies of 9.4 and 160 GHz. Analytic expressions for the second and fourth moments of the EPR line are deduced with inclusion of the difference between the exchange couplings of the copper spin with its different neighbors. From comparing the calculated and measured EPR linewidths, the positions of copper ions with the strongest exchange interactions are identified. The parameters of the anisotropic exchange interaction between copper ions in a pair are found. The parameter of the exchange interaction between magnetically nonequivalent copper centers is determined from the frequency dependence of the EPR linewidth. The directions of the principal axes of the g tensors are established. The data obtained count in favor of a quasi-one-dimensional model of magnetism in CuTe2O5.

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Authors and Affiliations

  1. Zavoĭskiĭ Physicotechnical Institute, Kazan Scientific Center, Russian Academy of Sciences, Sibirskiĭ trakt 10/7, Kazan 29, 420029, Tatarstan, Russia

    R. M. Eremina

  2. Kazan State University, ul. Kremlevskaya 18, Kazan, 420008, Tatarstan, Russia

    T. P. Gavrilova

  3. Institute for Physics, Augsburg University, Augsburg, D-86135, Germany

    N. -A. Krug von Nidda, A. Pimenov & A. Loidl

  4. Département de Physique de la Matière Condensée, Université de Geneva, Geneva 4, CH-1211, Switzerland

    J. Deisenhofer

Authors
  1. R. M. Eremina
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  2. T. P. Gavrilova
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  3. N. -A. Krug von Nidda
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  4. A. Pimenov
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  5. J. Deisenhofer
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  6. A. Loidl
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Correspondence to R. M. Eremina.

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Original Russian Text © R.M. Eremina, T.P. Gavrilova, N.-A. Krug von Nidda, A. Pimenov, J. Deisenhofer, A. Loidl, 2008, published in Fizika Tverdogo Tela, 2008, Vol. 50, No. 2, pp. 273–279.

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Eremina, R.M., Gavrilova, T.P., Krug von Nidda, N.A. et al. Anisotropic exchange interactions in CuTe2O5 . Phys. Solid State 50, 283–289 (2008). https://doi.org/10.1134/S106378340802011X

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  • DOI: https://doi.org/10.1134/S106378340802011X

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