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Giant dielectric susceptibility and magnetocapacitance effect in manganites at room temperature

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Abstract

Extremely high values of the relative permittivity up to 107 and the magnetocapacitance up to 105% have been found in La1 − x Sr x MnO3 single crystals (x = 0.1, 0.11). These phenomena are observed even at room temperature. The observed behavior can be a consequence of the strong interaction among charge, spin, and lattice degrees of freedom, which leads to charge and phase separation in the regime before the percolation threshold.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA

    R. F. Mamin, T. Egami & Z. Marton

  2. Zavoisky Physical-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, Kazan, 420029, Russia

    R. F. Mamin, C. A. Migachev & M. F. Sadykov

  3. Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee, 37996, USA

    T. Egami & Z. Marton

  4. Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA

    T. Egami

Authors
  1. R. F. Mamin
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  2. T. Egami
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  3. Z. Marton
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  4. C. A. Migachev
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  5. M. F. Sadykov
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Correspondence to R. F. Mamin.

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Original Russian Text © R.F. Mamin, T. Egami, Z. Marton, C.A. Migachev, M.F. Sadykov, 2007, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 10, pp. 731–735.

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Mamin, R.F., Egami, T., Marton, Z. et al. Giant dielectric susceptibility and magnetocapacitance effect in manganites at room temperature. Jetp Lett. 86, 643–646 (2008). https://doi.org/10.1134/S0021364007220067

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  • DOI: https://doi.org/10.1134/S0021364007220067

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