Direct observation of ferrielectricity at ferroelastic domain boundaries in CaTiO3 by electron microscopy.
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.
Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium. sandra.vanaert@ua.ac.be
Sandra
S
Van Aert
Stuart
S
Turner
Rémi
R
Delville
Dominique
D
Schryvers
Gustaaf
G
Van Tendeloo
Ekhard K H
EK
Salje
D017610:Calcium Compounds / Q000737:chemistry*; D004560:Electricity; D046529:Microscopy, Electron, Transmission; D010087:Oxides / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D017610:Calcium Compounds; D010087:Oxides; C059910:perovskite; D014025:Titanium