Article (Scientific journals)
Quantifying the change in optical absorption caused by the ferro- to paraelectric transition in Sm-substituted BiFeO3 powders
HILL, Christina; MELCHIORRE, Michele; MILESI-BRAULT, Cosme et al.
2025In Journal of Applied Physics, 138 (6)
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Keywords :
Anti ferroelectrics; Intermediate structures; Non-polar phase; Optical-; Optical-bandgap; Paraelectric transitions; Phase Change; Polar phasis; Property; Structural phase transition; Atomic and Molecular Physics, and Optics; Condensed Matter Physics; Physics and Astronomy (miscellaneous); Physics and Astronomy (all)
Abstract :
[en] The substitution of bismuth by samarium in BiFeO 3 is known to induce a structural phase transition from the polar phase to a non-polar phase, with a possible antiferroelectric intermediate structure. In this paper, we investigate the impact of this phase change on the optical properties. The optical bandgap was measured by diffuse reflectance as a function of temperature for several samarium concentrations across the structural phase transition. We found that the optical bandgap for each of the pure phases varies linearly with temperature and that the phase transitions are revealed by smooth transitions between those linear regimes. This allows us to quantify the contribution of the structural change in the optical absorption. We find that a difference in optical bandgap of about ≈ 130 meV can be attributed to the phase change. We anticipate that the same change could be obtained by applying an electric field in an antiferroelectric composition.
Disciplines :
Physics
Author, co-author :
HILL, Christina  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) ; Luxembourg Institute of Science and Technology, Belvaux, Luxembourg ; Inter-institutional Research Group Uni.lu—LIST on Ferroic Materials, Belvaux, Luxembourg
MELCHIORRE, Michele  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
MILESI-BRAULT, Cosme  ;  University of Luxembourg > Faculty of Science, Technology and Medicine > Department of Physics and Materials Science > Team Mael GUENNOU ; Université Paris-Saclay, CNRS, CentraleSupélec, Laboratoire SPMS, Gif-sur-Yvette, France
Gemeiner, Pascale;  Université Paris-Saclay, CNRS, CentraleSupélec, Laboratoire SPMS, Gif-sur-Yvette, France
Karolak, Fabienne;  Université Paris-Saclay, CNRS, CentraleSupélec, Laboratoire SPMS, Gif-sur-Yvette, France
Bogicevic, Christine;  Université Paris-Saclay, CNRS, CentraleSupélec, Laboratoire SPMS, Gif-sur-Yvette, France
DKHIL, Brahim  ;  University of Luxembourg ; Université Paris-Saclay, CNRS, CentraleSupélec, Laboratoire SPMS, Gif-sur-Yvette, France
Cañero-Infante, Ingrid ;  Université de Lyon, Institut des Nanotechnologies de Lyon, CNRS UMR 5270 ECL INSA UCBL CPE, Villeurbanne, France
GUENNOU, Mael  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) ; Inter-institutional Research Group Uni.lu—LIST on Ferroic Materials, Belvaux, Luxembourg
External co-authors :
yes
Language :
English
Title :
Quantifying the change in optical absorption caused by the ferro- to paraelectric transition in Sm-substituted BiFeO3 powders
Publication date :
14 August 2025
Journal title :
Journal of Applied Physics
ISSN :
0021-8979
eISSN :
1089-7550
Publisher :
American Institute of Physics
Volume :
138
Issue :
6
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Fonds National de la Recherche Luxembourg
Fonds National de la Recherche Luxembourg
Fonds National de la Recherche Luxembourg
Agence Nationale de la Recherche
Agence Nationale de la Recherche
Agence Nationale de la Recherche
Funding text :
C.H. acknowledges funding from the Fond National de la Recherche under Project No. PRIDE/15/10935404. C.M.-B. acknowledges funding from the Fond National de la Recherche under Project BIAFET C16/MS/1134912/Guennou. B.D. acknowledges funding from the Fond National de la Recherche under Project INTER/MOBILITY/19/13992074 and the French National Research Agency (ANR) through Nos. CERACOOL ANR-23-CE05-0012, SOFIANE ANR-23-CE09-0007, and PHOTOTRICS ANR-24-CE08-0954-03.
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