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Study of ferroelastic domains in HTMA crystals at the ferroelectric–ferroelastic transition
Author(s) -
Ribet M.,
Léon S.,
Lefaucheux F.,
Robert M. C.
Publication year - 1990
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889890002709
Subject(s) - tetramethylammonium , ferroelectricity , phase transition , ferroelasticity , phase (matter) , condensed matter physics , symmetry (geometry) , synchrotron , phase boundary , domain (mathematical analysis) , chemistry , ferroics , crystallography , materials science , physics , optics , quantum phase transition , geometry , ion , dielectric , mathematical analysis , optoelectronics , organic chemistry , mathematics , quantum critical point
The ferroelectric ferroelastic phase transitions of tetramethylammonium tetrachlorozincate (HTMA) were observed by standard X‐ray topography and by synchrotron topography. Observation of the phase boundary is possible in the latter case. The different kinds of domain walls observed in the ferroelastic phase cast doubts on the commonly assumed symmetry group of this phase.