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Effect of sample‐preparation history on domain and crystal structure in a relaxor‐ferroelectric single crystal
Author(s) -
Jeon Jongchul,
Oh Soong Ju,
Kim Kyou-Hyun
Publication year - 2020
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/s1600576720001235
Subject(s) - tetragonal crystal system , monoclinic crystal system , materials science , ferroelectricity , single crystal , crystallography , poling , ion , crystal structure , crystal (programming language) , chemistry , dielectric , optoelectronics , organic chemistry , computer science , programming language
The effect of sample‐preparation procedures on single crystals of the relaxor‐based ferroelectric Pb(Mg 1/3 Nb 2/3 )O 3 –31%PbTiO 3 (PMN–31%PT) has been investigated. PMN–31%PT single crystals were treated using the general sample‐preparation methods of mechanical polishing and Ar‐ion milling. Similar domain structures were artificially induced in both the mechanically polished and the Ar‐ion milled PMN–31%PT; this domain structure was not observed in the original PMN–31%PT single crystal. Macroscopic structural investigation using X‐ray diffraction showed that these general sample‐preparation methods induce a structural change from a monoclinic‐like to a tetragonal‐like structure. A study of local symmetry also indicated that Ar‐ion milling induces a structural change from the original monoclinic‐like crystal symmetry to a tetragonal‐like crystal symmetry. It is also demonstrated that the conventional sample‐preparation methods induce a poling‐like effect on PMN–31%PT.