Optical spectroscopy study on the photo-response in multiferroic BiFeO3

Reference : Optical spectroscopy study on the photo-response in multiferroic BiFeO3


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/40042

Title :	Optical spectroscopy study on the photo-response in multiferroic BiFeO3
Language :	English
Author, co-author :	Burkert, F. [> >]
	Kreisel, Jens [University of Luxembourg > Rectorate >]
	Kuntscher, C. A. [> >]
Publication date :	2016
Journal title :	Applied Physics Letters
Volume :	109
Issue/season :	18
Peer reviewed :	Yes (verified by ORBi^lu)
Audience :	International
ISSN :	0003-6951
Abstract :	[en] We investigate the underlying mechanism of the photostriction effect in single-crystalline BiFeO3 by transmission measurements in the infrared and visible frequency range under continuous illumination with a green 532 nm). The small photo-induced changes in the transmission spectrum reveal three well-defined absorption features at 1.22 eV, 1.66 eV, and 2.14 eV, which we assign to charge-transfer excitons and in-gap defect states probably related to oxygen vacancies. The intensity of the three absorption features follows a linear dependence on the illumination intensity for an irradiance above 90 W/m(2). Published by AIP Publishing.
Permalink :	http://hdl.handle.net/10993/40042
DOI :	10.1063/1.4966548 182903

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