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Origin of ferroelectric P‐E loop in cubic compositions and structure of poled (1‐ x )Bi(Mg 1/2 Zr 1/2 )O 3 ‐ x PbTiO 3 piezoceramics
Author(s) -
Upadhyay Ashutosh,
Pandey Rishikesh,
Singh Akhilesh Kumar
Publication year - 2017
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/jace.14735
Subject(s) - poling , tetragonal crystal system , phase boundary , ferroelectricity , materials science , crystallite , phase (matter) , condensed matter physics , crystallography , phase transition , electric field , crystal structure , dielectric , chemistry , physics , metallurgy , optoelectronics , organic chemistry , quantum mechanics
Structural analysis of electrically poled samples of polycrystalline, (1‐ x )Bi(Mg 1/2 Zr 1/2 )O 3 ‐ x PbTiO 3 piezoceramics across morphotropic phase boundary reveals electric field‐induced cubic to tetragonal phase transition and significant domain reorientation in tetragonal and two‐phase compositions. The c ‐axis domain elongation is observed for tetragonal compositions after poling. The morphotropic phase boundary composition, having coexisting cubic and tetragonal phases in the unpoled state, exhibits alteration in relative proportion of the two phases, in addition to domain extension and reorientation along c ‐axis. For the morphotropic phase boundary composition, the tetragonality (c/a) is enhanced with significantly large c ‐axis strain (~0.92%) in tetragonal phase after poling. Origin of ferroelectric P‐E loop in cubic compositions is linked with the electric field‐induced phase transition.