Relaxation behavior in 0.24Pb(In_1/2Nb_1/2)O₃-0.49Pb(Mg_1/3Nb_2/3)O₃-0.27PbTiO₃ ferroelectric single crystal

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• 作者：Enwei Sun^a ; ^b ; ^{sunew@hit.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Xudong Qi^b ; Zhongyuan Yuan^b ; Shijing Sang^b ; Rui Zhang^b ; Bin Yang^b ; Wenwu Cao^b ; ^c ; ^{dzk@pdu.edu" class="auth_mail" title="E-mail the corresponding author} ; Liancheng Zhao^a
• 关键词：Dielectric relaxation ; PIN&ndash ; PMN&ndash ; PT ; Frequency dispersion ; PNRs
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：42
• 期：4
• 页码：4893-4898
• 全文大小：1087 K

文摘

Dielectric relaxation properties of the ternary relaxor-based ferroelectric 0.24Pb(In_1/2Nb_1/2)O₃–0.49Pb(Mg_1/3Nb_2/3)O₃–0.27PbTiO₃ single crystal have been investigated as a function of temperature (300–570 K) in the frequency range from 100 Hz to 100 kHz. It was found that the variation of the permittivity maximum temperature T_m with frequency obeys the Vogel–Fulcher relationship. The high-temperature (T>T_m) side of the dielectric permittivity deviated from the Curie–Weiss law, but can be described by the Lorenz-type relationship. The coercive field obtained from the polarization hysteresis loops gradually decreases with increasing temperature, and the remnant polarization persists above T_m due to the existence of polar nanoregions (PNRs).