Anisotropic relaxation and crystallographic tilt in BiFeO3 on miscut SrTiO3 (001)

Title
Anisotropic relaxation and crystallographic tilt in BiFeO3 on miscut SrTiO3 (001)
Authors
Rebecca J. SichelAlexei GrigorievDal-Hyun DoSeung-Hyub Baek장호원Chad M. FolkmanChang-Beom EomZhonghou CaiPaul G. Evans
Keywords
Strain relaxation; Crystallographic tilt; BiFeO3; 2M24180
Issue Date
2010-02
Publisher
Applied physics letters
Citation
VOL 96, 051901-1-051901-3
Abstract
Epitaxial BiFeO3 thin films on miscut (001) SrTiO3 substrates relax via mechanisms leading to an average rotation of the crystallographic axes of the BiFeO3 layer with respect to the substrate. The angle of the rotation reaches a maximum in the plane defined by the surface normal of the film and the direction of the surface miscut. X-ray microdiffraction images show that each BiFeO3 mosaic block is rotated by a slightly different angle and contains multiple polarization domains. These effects lead to a complicated overall symmetry in BiFeO3 thin films. This relaxation mechanism can be extended to other complex oxides.
URI
http://pubs.kist.re.kr/handle/201004/37134
ISSN
0003-6951
Appears in Collections:
KIST Publication > Article
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