Direct Observation of Ferrielectricity at Ferroelastic Domain Boundaries in CaTiO3 by Electron Microscopy

作者：Van Aert Sandra^*; Turner Stuart; Delville Remi; Schryvers Dominique; Van Tendeloo Gustaaf; Salje Ekhard K H

来源：Advanced Materials, 2012, 24(4): 523-+.

DOI：10.1002/adma.201103717

• ferroelastic domain boudaries
• ferrielectricity
• CaTiO3
• quantitative aberration-corrected transmission electron microscopy
• atomic displacements

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.

• 出版日期2012-1-24