Electric-field-induced and temperature-induced phase transitions in high-strain ferroelectric Pb(Mg1/3Nb2/3)0.67Ti0.33O3 single crystal
Electric-field-induced and temperature-induced phase transitions in high-strain ferroelectric Pb(Mg1/3Nb2/3)0.67Ti0.33O3 single crystal
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DOI：
10.1088/0953-8984/18/35/018
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发表时间：
2006-08
期刊：
影响因子：
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通讯作者：
R. Chien;C. Tu;V. H. Schmidt;F.-T. Wang
中科院分区：
文献类型：
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作者：
R. Chien;C. Tu;V. H. Schmidt;F.-T. Wang
本文研究了（001）切Pb（Mg 1/3 Nb 2/3）0.67Ti0.33O3（PMNT33%）单晶的电场诱导相变和温度诱导相变。介电性能和域结构（通过偏光显微镜）作为温度和电场的函数进行测量。还测量了室温下极化曲线与电场曲线的关系。在没有任何电场的情况下，加热时，分别在350和430 K附近发生一级类型的菱面体（C）相变序列。在室温下沿[001]方向施加沿着直流电场时，随着电场强度的增加，[001]四方晶系（T001）相畴由不同的相变序列（即，和）诱导产生。此外，在这项工作中观察到电场诱导的微裂纹。
This work is to study electric (E)-field-induced and temperature-induced phase transitions in (001)-cut Pb(Mg1/3Nb2/3)0.67Ti0.33O3 (PMNT33%) single crystal, which are critical concerns for piezoelectric applications. Dielectric properties and domain structures (by polarizing microscope) are measured as functions of temperature and E field. The hysteresis loop of the polarization versus E field at room temperature is also measured. Without any E-field application, upon heating a first-order-type phase transition sequence rhombohedral (C) takes place near 350 and 430 K, respectively. Under a dc E-field application along [001] at room temperature, [001] tetragonal (T001) phase domains are induced by various phase transition sequences, i.e. , , , and , as the E-field strength increases. In addition, E-field-induced microcracking is observed in this work.