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	Polarization rotation and multiphase coexistence for Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals at the morphotropic phase boundary under electric loading
	Fang, F. ; Luo, Xu ; Yang, W.
	2010-10-12 ; 2010-10-12
关键词	crystal structure dielectric polarisation domain boundaries lead compounds piezoelectric materials piezoelectricity solid-state phase transformations space groups PIEZOELECTRIC PROPERTIES DOMAIN-STRUCTURE FIELD TRANSFORMATION GROWTH PBTIO3 Physics, Condensed Matter
中文摘要	In situ observations of the domain evolution and the polarization rotation under bipolar cyclic and static electric fields are carried out for [001]-oriented 68Pb(Mg1/3Nb2/3)O-3-32PbTiO(3) (PMN-32PT) single crystal which is located at the morphotropic phase boundary (MPB). The results demonstrate that after being poled in [001] direction, the original rhombohedral (R) phase is transformed into a monoclinic M-C phase with Pm space group. When the single crystal is subjected to bipolar cyclic electric field, distinct domain-boundary structures are revealed which are unlikely to be detected in static electric loadings. The existence of R phase is also detected during the polarization reversal. Under static electric field, polarization rotation from M-C to R occurs and, as the field increases, phase transition from M-C to tetragonal (T) phase takes place. In the vicinity of regions where M-C-T phase transition takes place, polarization reversal of M-C phase is observed, which is attributed to the local stress field from the strain compatibility between the transitioned area and the nontransitioned area. With the removal of the field, T and M-C phases retain while R phase reverses to M-C phase. The results demonstrate that the energy differences among M-C, R, and T phases are rather slim. Accordingly, the multiphase coexistence and polarization rotation under both cyclic and static electric loadings might be responsible for the ultrahigh piezoelectric response of the [001]-oriented rhombohedral Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals near the MPB.
语种	英语 ; 英语
出版者	AMER PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78946]
专题	清华大学
推荐引用方式 GB/T 7714	Fang, F.,Luo, Xu,Yang, W.. Polarization rotation and multiphase coexistence for Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals at the morphotropic phase boundary under electric loading[J],2010, 2010.
APA	Fang, F.,Luo, Xu,&Yang, W..(2010).Polarization rotation and multiphase coexistence for Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals at the morphotropic phase boundary under electric loading..
MLA	Fang, F.,et al."Polarization rotation and multiphase coexistence for Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals at the morphotropic phase boundary under electric loading".(2010).

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