Optical absorption in epitaxial La{sub 1-x}Sr{sub x}FeO{sub 3} thin films

Journal Article · Mon Feb 25 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4794145· OSTI ID:22162758

Scafetta, M D.; Xie, Y. J.; Torres, M.; Spanier, J. E.; May, S. J. ^[1]

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1. Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104 (United States)

We report the dependence of optical absorption on Sr concentration in La{sub 1-x}Sr{sub x}FeO{sub 3} (LSFO) (x{<=}0.4) perovskite thin films. Strained epitaxial films were deposited on SrTiO{sub 3} substrates using oxide molecular beam epitaxy. We find systematic changes in the optical absorption spectra with increasing x including a red-shift of transition energies and the increasing presence of a lower energy transition within the fundamental gap of pure LaFeO{sub 3}. These results serve as a demonstration of the complex manner in which absorption spectra can be altered in complex oxides via heterovalent A-site substitution.

• OSTI ID: 22162758
• Journal Information: Applied Physics Letters, Vol. 102, Issue 8; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ABSORPTION SPECTRA
CRYSTAL GROWTH
DEPOSITS
FERRITES
LANTHANUM COMPOUNDS
LAYERS
MOLECULAR BEAM EPITAXY
OXIDES
PEROVSKITE
RED SHIFT
STRAINS
STRONTIUM COMPOUNDS
STRONTIUM TITANATES
SUBSTRATES
THIN FILMS