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Direct Observation of Ferrielectricity at Ferroelastic Domain Boundaries in CaTiO 3 by Electron Microscopy
Author(s) -
Van Aert Sandra,
Turner Stuart,
Delville Rémi,
Schryvers Dominique,
Van Tendeloo Gustaaf,
Salje Ekhard K. H.
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201103717
Subject(s) - orthorhombic crystal system , transmission electron microscopy , materials science , domain (mathematical analysis) , boundary (topology) , ferroelectricity , crystallography , electron microscope , electron , content (measure theory) , condensed matter physics , engineering physics , optics , nanotechnology , optoelectronics , physics , crystal structure , chemistry , mathematical analysis , quantum mechanics , mathematics , dielectric
High‐resolution aberration‐corrected transmission electron microscopy aided by statistical parameter estimation theory is used to quantify localized displacements at a (110) twin boundary in orthorhombic CaTiO 3 . The displacements are 3–6 pm for the Ti atoms and confined to a thin layer. This is the first direct observation of the generation of ferroelectricity by interfaces inside this material which opens the door for domain boundary engineering.