Relaxor ferroelectric characteristics and temperature-dependent domain structure in a (110)-cut(PbMg1∕3Nb2∕3O3)0.75(PbTiO3)0.25single crystal
Relaxor ferroelectric characteristics and temperature-dependent domain structure in a (110)-cut(PbMg1∕3Nb2∕3O3)0.75(PbTiO3)0.25single crystal
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DOI：
10.1103/physrevb.72.064114
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发表时间：
2005-08
影响因子：
3.7
通讯作者：
X. Zhao;J. Dai;J. Wang;H. Chan;C. Choy;X. Wan;H. Luo
中科院分区：
文献类型：
--
作者：
X. Zhao;J. Dai;J. Wang;H. Chan;C. Choy;X. Wan;H. Luo
用变温电滞回线和介电常数测量方法研究了110切PbMg_（1/3）Nb_（2/3）O_3 ~（0.75）PbTiO_3 ~（0.25）单晶的弛豫铁电特性。在生长和极化样品的铁电畴结构和演变也进行了研究，通过温度依赖的压电响应力显微镜。从生长的单晶的结果表明，微畴尺寸分布遵循指数截止，和晶体表现出从铁电微畴顺电相加热时的过渡，而被冷却回室温，新的微畴重建。相比之下，在极化样品中观察到层状宏畴，并且在加热时分别观察到在90 °C下从宏畴结构到微畴结构的转变和在115 °C下从微畴结构到顺电相的转变。
Relaxor ferroelectric characteristics of 110 -cut PbMg1/3Nb2/3O3 0.75 PbTiO3 0.25 single crystal has been revealed by temperature-dependent hysteresis loops and dielectric permittivities measurements. Ferroelectric domain structure and evolution in the as-grown and the poled samples have also been studied by means of temperature-dependent piezoresponse force microscopy. The result from the as-grown single crystal reveals that the microdomain size distribution follows an exponential cutoff, and the crystal exhibits a transition from ferroelectric microdomain to paraelectric phase upon heating; while being cooled back to room temperature, new microdomains are rebuilt. By contrast, lamellar-shaped macrodomains have been observed in the poled sample and transitions from macroto microdomain structures at 90 °C and from microdomain structure to paraelectric phase at 115 °C have been observed upon heating, respectively.