Optical absorption in epitaxial La1−xSrxFeO3 thin films
Abstract
We report the dependence of optical absorption on Sr concentration in La1−xSrxFeO3 (LSFO) (x≤0.4) perovskite thin films. Strained epitaxial films were deposited on SrTiO3 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 LaFeO3. 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 25, 2013
- Source ID
- 10.1063/1.4794145
Entities
People
- J. E. Spanier
- M. D. Scafetta
- M. Torres
- S. J. May
- Y. J. Xie
Organizations
- Drexel University
- Office of Naval Research