Temperature dependence of electric-field-induced domain switching in 0.7Pb(Mg_1/3Nb_2/3)O₃-0.3PbTiO₃ single crystal

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• 作者：Zhu Wang^a ; Rui Zhang^a ; ^{ruizhang_ccmst@hit.edu.cn} ; ^{ruizhang_ccmst@yahoo.com.cn} ; Enwei Sun^a ; Wenwu Cao^a ; ^b
• 关键词：Ferroelectrics ; Piezoelectric property ; Phase transformation
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：25 June, 2012
• 卷：527
• 期：Complete
• 页码：101-105
• 文件大小：1174 K

摘要

The influence of temperature on electric-field-induced domain switching of [0 0 1]_c oriented 0.7Pb(Mg_1/3Nb_2/3)O₃-0.3PbTiO₃ (PMN-0.3PT) single crystal has been studied. The piezoelectric properties of PMN-0.3PT single crystal change drastically at one critical field at 30 掳C and two critical fields at 90 掳C corresponding to electric-field-induced domain switching. The domain structures were studied by polarizing light microscopy on the [1 0 0]_c surface under the electric field applied along [0 0 1]_c direction. The PMN-0.3PT single crystal exhibits a rapid increase in piezoresponse at 100 V/mm, which is related to R-M_A phase transformation. At 90 掳C, the M and T_0 0 1 phases coexist at 100 V/mm, while T_0 0 1 mono-domain appears at 300 V/mm. The domain switching process here can be identified as (T_1 0 0 or T_0 1 0) 鈫?#xA0;M 鈫?#xA0;T_0 0 1. The experimental results show that the phase state and domain structures of the crystal are closely related to the piezoelectric behaviors.