Physics of the Solid State

, Volume 60, Issue 1, pp 60–63 | Cite as

Effect of a magnetic field on the permittivity of 80%La0.7Sr0.3MnO3/20%GeO2 composite

  • Yu. V. KabirovEmail author
  • V. G. Gavrilyachenko
  • A. S. Bogatin
  • E. I. Sitalo
  • V. K. Yatsenko


The dielectric properties of a magnetoresistive conducting two-phase 80%La0.7Sr0.3MnO3/20%GeO2 (wt %) composite have been studied near the percolation threshold in magnetic fields from 0 to 15 kOe at frequencies of the measurement field from 5 kHz to 1 MHz. The samples have inductive impedances; i.e., their permittivities can be considered negative due to a high conductivity in this frequency range. The permittivity increases in magnitude in magnetic field, and the values of the magnetodielectric coefficient reach 23% at room temperature. The reasons for the effect of magnetic field on the dielectric permittivity of samples are discussed.


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • Yu. V. Kabirov
    • 1
    Email author
  • V. G. Gavrilyachenko
    • 1
  • A. S. Bogatin
    • 1
  • E. I. Sitalo
    • 1
  • V. K. Yatsenko
    • 1
  1. 1.Southern Federal UniversityRostov-on-DonRussia

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