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

Xiaobing Li; Cong Tao; Shengdong Nie; Xuan Ren; Haiqing Xu; Haosu Luo; Kwok Ho Lam; Xiaoming Jiang; Zhi Guo

doi:10.1016/j.physb.2021.413394

Investigation of the dielectric relaxation mechanisms for Pb(Fe_1/2Nb_1/2)O₃ single crystal based on the universal relaxation law

Xiaobing Li, Cong Tao, Shengdong Nie, Xuan Ren, Haiqing Xu, Haosu Luo, Kwok Ho Lam, Xiaoming Jiang, Zhi Guo

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

1 Citation (Scopus)

Abstract

Large-sized multiferroics Pb(Fe_1/2Nb_1/2)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.

Original language	English
Article number	413394
Journal	Physica B: Condensed Matter
Volume	624
DOIs	https://doi.org/10.1016/j.physb.2021.413394
Publication status	Published - 1 Jan 2022

Keywords

Bridgeman method
Dielectric relaxation
Ferroelectric single crystal
X-ray absorption spectrum

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

More information

10.1016/j.physb.2021.413394

Cite this

@article{50e71a78922f4dd3a4eee4311b126d34,

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

abstract = "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.",

keywords = "Bridgeman method, Dielectric relaxation, Ferroelectric single crystal, X-ray absorption spectrum",

author = "Xiaobing Li and Cong Tao and Shengdong Nie and Xuan Ren and Haiqing Xu and Haosu Luo and Lam, {Kwok Ho} and Xiaoming Jiang and Zhi Guo",

note = "Funding Information: This work was financially supported by the Shanghai Municipal Natural Science Foundation (No. 19ZR1436200 & 19440760800 ) and the Scientific and Technological Plan of Guangdong Province ( 2017A050506036 ). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

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doi = "10.1016/j.physb.2021.413394",

language = "English",

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TY - JOUR

T1 - Investigation of the dielectric relaxation mechanisms for Pb(Fe1/2Nb1/2)O3 single crystal based on the universal relaxation law

AU - Li, Xiaobing

AU - Tao, Cong

AU - Nie, Shengdong

AU - Ren, Xuan

AU - Xu, Haiqing

AU - Luo, Haosu

AU - Lam, Kwok Ho

AU - Jiang, Xiaoming

AU - Guo, Zhi

N1 - Funding Information: This work was financially supported by the Shanghai Municipal Natural Science Foundation (No. 19ZR1436200 & 19440760800 ) and the Scientific and Technological Plan of Guangdong Province ( 2017A050506036 ). Publisher Copyright: © 2021 Elsevier B.V.

PY - 2022/1/1

Y1 - 2022/1/1

N2 - 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.

AB - 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.

KW - Bridgeman method

KW - Dielectric relaxation

KW - Ferroelectric single crystal

KW - X-ray absorption spectrum

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VL - 624

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