首页|Investigation of the dielectric relaxation mechanisms for Pb(Fe1/2Nb1/2)O3 single crystal based on the universal relaxation law

Investigation of the dielectric relaxation mechanisms for Pb(Fe1/2Nb1/2)O3 single crystal based on the universal relaxation law

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  • NSTL
  • Elsevier
? 2021 Elsevier B.V.Large-sized multiferroics Pb(Fe1/2Nb1/2)O3 (PFN) single crystal was grown by Bridgeman method in order to understand the giant dielectric response by investigating the electrical conductivity and dielectric properties. The synchrotron radiation soft x-ray absorption spectrum revealed the valence states of Fe in PFN crystal. PFN exhibits semiconductor behaviors in the thermal active electrical conductivity investigation. Besides, the frequency-dependent dielectric constants were measured in the frequency range from 100 Hz to 1 MHz to study the dielectric relaxation behaviors. Two relaxation processes were found and described by Havriliak-Negami equation. The origin of dielectric relaxation in PFN with semiconductor characters was discussed based on the universal relaxation law for a dipolar system.

Bridgeman methodDielectric relaxationFerroelectric single crystalX-ray absorption spectrum

Jiang X.、Guo Z.、Li X.、Tao C.、Nie S.、Ren X.、Xu H.、Luo H.、Lam K.H.

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Guangdong Institute of Intelligent Manufacturing

Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

School of Medical Instrument and Food Engineering University of Shanghai for Science and Technology

Key Laboratory of Inorganic Functional Material and Device Shanghai Institute of Ceramics Chinese Academy of Sciences

Department of Electrical Engineering The Hong Kong Polytechnic University

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2022

10.1016/j.physb.2021.413394

Physica

Physica

ISSN：0921-4526
年,卷(期)：2022.624
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