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This article is cited in 3 scientific papers (total in 3 papers)
International conference ''Phase transitions, critical and nonlinear phenomena in condensed matter'', Makhachkala, September 15-20, 2019
Dielectrics
Temperature–frequency dependence of the dielectric response in LuFe$_{2}$O$_{4}$ multiferroics
G. M. Gadjieva, A.G. Gamzatova, R. A. Alieva, N. S. Abakarovaa, L. L. Emiraslanovab, M. N. Markelovac, A. R. Kaulc a Daghestan Institute of Physics after Amirkhanov, Makhachkala, Russia
b Daghestan State University, Makhachkala
c Lomonosov Moscow State University
Abstract:
The temperature–frequency spectra of the complex dielectric permittivity of the LuFe$_{2}$O$_{4}$ multiferroics have been studied in the temperature range 100–400 K at frequencies 20 Hz–120 MHz. It is found that the temperature coefficient of the dielectric permittivity changes its sign and the ac conductivity has maxima and minima in the temperature range $\sim$150–350 K and in the frequency range $\sim$30–120 MHz. These specific features are due to independent resonance mechanisms: the coincidence of frequency of the measuring ac voltage with the frequency of electron jumps as the hopping conductivity takes place; the proximity of the measurement signal period to the time of formation of a barrier layer at the boundary of contact with the sample; and the approximation of the frequency of an ac external field to the frequency of the sample structural elements.
Keywords:
multiferroic, impedance, dielectric constant, ac-conductivity.
Received: 30.12.2019 Revised: 30.12.2019 Accepted: 10.01.2020
Citation:
G. M. Gadjiev, A.G. Gamzatov, R. A. Aliev, N. S. Abakarova, L. L. Emiraslanova, M. N. Markelova, A. R. Kaul, “Temperature–frequency dependence of the dielectric response in LuFe$_{2}$O$_{4}$ multiferroics”, Fizika Tverdogo Tela, 62:5 (2020), 678–682; Phys. Solid State, 62:5 (2020), 765–769
Linking options:
https://www.mathnet.ru/eng/ftt8421 https://www.mathnet.ru/eng/ftt/v62/i5/p678
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