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This article is cited in 2 scientific papers (total in 2 papers)
Ferroelectricity
Investigation of dielectric response, conductivity, and thermostimulated depolarization current in PbNi$_{1/3}$Nb$_{2/3}$O$_{3}$ relaxor ferroelectric
A. D. Polushina, E. D. Obozova, V. G. Zalesskii, T. A. Smirnova, S. G. Lushnikov Ioffe Institute, St. Petersburg, Санкт-Петербург, Россия
Abstract:
This paper presents results of a study of temperature dependences of dielectric response and DC and AC - conductivity in single crystals of the relaxor ferroelectric PbNi$_{1/3}$Nb$_{2/3}$O$_{3}$ (PNN) in a wide range of frequencies (10 Hz – 100 kHz) and temperatures (80 – 750 K). Anomalies in the dielectric response in the form of broad frequency-dependent maxima in the vicinity of 153 and 730 K are observed. The thermal activation character of DC conductivity has been obtained, and activation energies determined as $E_a$ = 770 meV ($T$ > 310 K) and $E_a$ = 23 meV ($T$ < 310 K). The analysis of conductivity gives reason to assume the existence of local conductivity in the low-temperature region. It is shown that the conductivity character changes above 350 K from the local to the bulk one. Measurement by thermally stimulated depolarization has shown the presence of a residual polarization below 130 K.
Keywords:
relaxor ferroelectrics, multiferroics, polarization, dielectric response, conductivity.
Received: 18.04.2021 Revised: 18.04.2021 Accepted: 19.04.2021
Citation:
A. D. Polushina, E. D. Obozova, V. G. Zalesskii, T. A. Smirnova, S. G. Lushnikov, “Investigation of dielectric response, conductivity, and thermostimulated depolarization current in PbNi$_{1/3}$Nb$_{2/3}$O$_{3}$ relaxor ferroelectric”, Fizika Tverdogo Tela, 63:9 (2021), 1382–1386; Phys. Solid State, 63:10 (2021), 1508–1512
Linking options:
https://www.mathnet.ru/eng/ftt8047 https://www.mathnet.ru/eng/ftt/v63/i9/p1382
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