Phase structure and quasi-single-domain mechanism in Pb(Mg1/3Nb2/3)O3-xPbTiO3 single crystals near morphotropic phase boundary

Based on the domain configuration analysis, we demonstrate that orthorhombic (O) phase is a structural bridge between the rhombohedral (R) and tetragonal (T) phase in Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) crystals near the morphotropic phase boundary (MPB), as illustrated in the composition-temperature...

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Bibliographic Details
Published in:Journal of applied physics 2019-07, Vol.126 (4)
Main Authors: Zhou, Yaming, Li, Qiang, Xu, Chao, Zhuo, Fangping, Liu, Donglin, Yan, Qingfeng, Zhang, Yiling, Chu, Xiangcheng
Format: Article
Language:English
Subjects:
Applied physics
Configurations
Deoxidizing
Depolarization
Domains
Electric bridges
Electric fields
Ferroelectric materials
Ferroelectricity
Nondestructive testing
Phase boundaries
Phase diagrams
Relaxors
Single crystals
Solid phases
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Summary:Based on the domain configuration analysis, we demonstrate that orthorhombic (O) phase is a structural bridge between the rhombohedral (R) and tetragonal (T) phase in Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) crystals near the morphotropic phase boundary (MPB), as illustrated in the composition-temperature phase diagram. After poling along the polar direction, domain patterns in PMN-0.30PT, PMN-0.33PT, and PMN-0.37PT single crystals are found to accord with quasisingle-domain configurations (1R*, 1O*, and 1T*) after removal of the electric field. Furthermore, by the thermodynamic theory analysis, the quasisingle-domain states present one dominant domain and other adjacent domains owing to partial depolarization. Our results provide a reliable and nondestructive method to identify the phase structures near the MPB region in the PMN-xPT and other similar relaxor-ferroelectric single crystals.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5097681