XXI All-Russian School-Seminar on Condensed Matter Physics (SPFKS-21), Yekaterinburg, March 18-25, 2021
Magnetism

Negative dynamic dielectric permittivity of a ceramic multiferroic LuFe$_{2}$O$_{4}$ with oxygen nonstoichiometry under the combined influence of temperature and electric field

G. M. Gadjiev^a, A.G. Gamzatov^a, R. A. Aliev^a, N. S. Abakarova^a, M. Markelova^b, A. R. Kaul<sup>b

a</sup> Daghestan Institute of Physics after Amirkhanov
^b Lomonosov Moscow State University

Abstract: The temperature dependences (100 – 380 K) of the dielectric constant and conductivity of a ceramic multiferroic LuFe$_{2}$O$_{4}$ with oxygen nonstoichiometry, measured at alternating current (1, 10, 100 kHz, 1 MHz) and in a static electric field (0 – 8 V/1.4 mm), are presented. The regularity of the sign inversion of the dynamic permittivity caused by the appearance of solid-state inductance in the samples is discussed.

Keywords: negative permittivity, solid-state inductance, multiferroic.

Received: 08.07.2021
Revised: 13.07.2021
Accepted: 16.07.2021

DOI: 10.21883/FTT.2021.12.51656.30s

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