Optical properties of quasi-tetragonal BiFeO3 thin films

Publication Type
Journal Article
Authors
DOI
10.1063/1.3364133
Abstract
Optical transmission spectroscopy and spectroscopic ellipsometry were used to extract the optical properties of an epitaxially grown quasi-tetragonal BiFeO3 thin film in the near infrared to near ultraviolet range. The absorption spectrum is overall blue shifted compared with that of rhombohedral BiFeO3, with an absorption onset near 2.25 eV, a direct 3.1 eV band gap, and charge transfer excitations that are ∼0.4 eV higher than those of the rhombohedral counterpart. We interpret these results in terms of structural strain and local symmetry breaking. © 2010 American Institute of Physics.
Notes
cited By 121
Journal
Applied Physics Letters
Volume
96
Year of Publication
2010
Number
13
ISSN Number
00036951
Keywords
Research Areas
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