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Optical, Electron Microscopic, and X‐ray Topographic Studies of Ferroic Domains in Barium Titanate Crystals Grown from High‐Temperature Solution
Author(s) -
Park Bong Mo,
Chung Su Jin
Publication year - 1994
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.1151-2916.1994.tb04569.x
Subject(s) - lamellar structure , barium titanate , tetragonal crystal system , wedge (geometry) , materials science , electron microscope , crystallography , scanning electron microscope , optics , optical microscope , diffraction , condensed matter physics , crystal structure , chemistry , composite material , physics , ceramic
BaTiO 3 single crystals were grown by the top‐seeded solution growth (TSSG) technique and the spatial domain configurations in the tetragonal crystals were observed by using a polarizing microscope, SEM, TEM, and X‐ray topography. The 90° domain boundaries were stopped, forming wedge shapes, by another 90° boundary. All of the straight lamellar boundaries in the observed domain patterns, even in the herringbone structure, can be interpreted as head‐to‐tail 90° walls. The irregular overlapped boundary can be observed by using a polarizing microscope and X‐ray topography. It looks as if the lamellar domains are penetrating one another because the wedge‐shaped lamellar domains are spatially overlapped at those boundaries. After thinning and polishing {001} crystal plates, some 90° a–c boundaries disappear and a ‐domains become predominant.