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Materials 2017, 10(4), 349; doi:10.3390/ma10040349

Switching Characteristics and High-Temperature Dielectric Relaxation Behaviours of Pb(Zn1/3Nb2/3)0.91Ti0.09O3 Single Crystal

School of Physics & Optoelectric Engineering, Guangdong University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
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Academic Editor: Anke Weidenkaff
Received: 1 March 2017 / Revised: 15 March 2017 / Accepted: 21 March 2017 / Published: 28 March 2017
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Abstract

This work evaluated the resistance switching characteristics in the (100)-oriented Pb(Zn1/3Nb2/3)0.91Ti0.09O3 (PZNT) single crystal. The current hysteresis can be closely related to the ferroelectric polarization and we provided a possible explanation using a model about oxygen vacancies to analyze the mechanism of switching. The obvious frequency dispersion of the relative permittivity signified the relaxer-type behavior of the sample. The value of the relaxation parameter γ = 1.48 was estimated from the linear fit of the modified Curie-Weiss law, indicating the relaxer nature. High-temperature dielectric relaxation behaviors were revealed in the temperature region of 400–650 °C. In addition, under the measuring frequency of 10 kHz, εr was tunable by changing the electric field and the largest tunability of εr reached 14.78%. At room temperature, the high pyroelectric coefficient and detectivity figure of merit were reported. View Full-Text
Keywords: PZNT single crystal; switching characteristics; oxygen vacancies; dielectric relaxation; pyroelectric coefficient PZNT single crystal; switching characteristics; oxygen vacancies; dielectric relaxation; pyroelectric coefficient
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MDPI and ACS Style

Zhu, Z.; Tang, X.; Jiang, Y.; Liu, Q.; Zhang, T.; Li, W. Switching Characteristics and High-Temperature Dielectric Relaxation Behaviours of Pb(Zn1/3Nb2/3)0.91Ti0.09O3 Single Crystal. Materials 2017, 10, 349.

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