Physics of the Solid State
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Negative dynamic dielectric permittivity of a ceramic multiferroic LuFe2O4 with oxygen nonstoichiometry under the combined influence of temperature and electric field
Gadjiev G. M.
1, Gamzatov A G.1, Aliev R A.1, Abakarova N S.1, Markelova M N.2, Kaul’ A R.2
1Amirkhanov Institute of Physics, Daghestan Federal Research Center, Russian Academy of Sciences, Makhachkala, Russia
2Lomonosov Moscow State University, Moscow, Russia
2Lomonosov Moscow State University, Moscow, Russia
Email: hadzhygm@mail.ru
The temperature dependences (100-380 K) of the dielectric constant and conductivity of a ceramic multiferroic LuFe2O4 with oxygen nonstoichiometry, measured at alternating current (1, 10, 100 kHz, 1 MHz) and in a static electric field (0-7.1 V/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.
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