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Comparison of internal friction and torsion strain spectra for the cubic–tetragonal transformation of PMN‐32PT crystal
Author(s) -
Wu XiaoYi,
Xiong XiaoMin,
Tang XinGui,
Zhao XiangYong,
Luo HaoSu,
Zhang JinXiu
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201046587
Subject(s) - tetragonal crystal system , torsion (gastropod) , materials science , crystallography , condensed matter physics , diffusionless transformation , transformation (genetics) , spectral line , crystal (programming language) , crystal structure , martensite , composite material , chemistry , physics , quantum mechanics , biochemistry , microstructure , surgery , gene , computer science , programming language , medicine
Internal friction and torsion strain spectra are compared for PMN‐32PT crystal and it is found that the abrupt changes and random bouncing of the torsion strain are ascribed to a cubic–tetragonal transformation, which is accompanied by a large internal friction peak. This observation confirms that the cubic–tetragonal transformation of PMN‐32PT crystal is a burst‐type martensite transformation. We propose that it is caused by a parallel order–disorder transformation taken by the polar nanoregions (PNRs) inside PMN‐32PT, during which 90°‐domain twins inside the PNRs perform reorientations to satisfy the constraint of macroferroelectric domains.