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[101]‐Oriented Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 Single Crystals Under Electric Loadings: Polarization Rotation Linking M B , O , and R Phases
Author(s) -
Fang Fei,
Yang Wei,
Luo Xu
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03975.x
Subject(s) - monoclinic crystal system , electric field , phase boundary , materials science , single crystal , polarization (electrochemistry) , piezoelectricity , ferroelectricity , phase (matter) , metastability , condensed matter physics , crystallography , phase transition , polarization density , dielectric , crystal structure , magnetic field , chemistry , physics , magnetization , composite material , optoelectronics , organic chemistry , quantum mechanics
We report on the existence of monoclinic ( M B ), orthohombic ( O ), and rhombohedral ( R ) phases in [101]‐oriented 74Pb(Mg 1/3 Nb 2/3 )O 3 –26PbTiO 3 (PMN–26PT) single crystals under electric loadings. Before electric loadings, the [101]‐oriented PMN–26PT single crystal is composed of R and monoclinic phases. Both M B and R phases are revealed after being poled in the [101] direction. When the single crystal is subjected to bipolar cyclic electric field, an M B phase bridges the reversal of domains of R phase. Reversal of the domains of M B phase is achieved by either 180° domain switching or non‐180° domain switchings. Under static electric field, polarization rotation from R to M B again occurs, and as the field increases, phase transition from M B to O phase occurs. The O phase is metastable because it tends to change back to M B phase after the removal of electric field. The findings are of importance for understanding the microstructure characteristics of [101]‐oriented PMN–PT single crystals that show the ultrahigh piezoelectric performances at the morphotropic phase boundary.