Reference : Optical spectroscopy on the photo-response in multiferroic BiFeO3 at high pressure
Scientific journals : Other
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/45045
Optical spectroscopy on the photo-response in multiferroic BiFeO3 at high pressure
English
Meggle, F. [> >]
Ebad-Allah, J. [> >]
Kreisel, Jens mailto [University of Luxembourg > CRC > Vice-rectorate for Research (VR Research)]
Kuntscher, C. A. [> >]
2019
JOURNAL OF APPLIED PHYSICS
126
16
Yes (verified by ORBilu)
International
0021-8979
[en] The pressure dependence of light-induced effects in single-crystalline BiFeO3 is studied by optical spectroscopy. At low pressures, we observe three light-induced absorption features with energies just below the two crystal-field excitations and the absorption onset, respectively. These absorption features were previously ascribed to excitons, possibly connected with the ultrafast photostriction effect in BiFeO3. The pressure-induced redshift of the absorption features follows the pressure dependence of the corresponding crystal-field excitations and absorption onset, suggesting the link between them. Above the structural phase transition at P-c1 approximate to 3.5 GPa, the three absorption features disappear, suggesting their connection to the polar phase in BiFeO3. The pressure-induced disappearance of the photoinduced features is irreversible upon pressure release. Published under license by AIP Publishing.
http://hdl.handle.net/10993/45045
10.1063/1.5125741

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