Infrared optical properties of La{sub 0.7}Ca{sub 0.3}MnO{sub 3} epitaxial films
- Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow district 142432 (Russia)
- Department of Physics, California Institute of Technology, Pasadena, California 91125 (United States)
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 (United States)
The reflectance of La{sub 0.7}Ca{sub 0.3}MnO{sub 3} epitaxial thin films on perovskite substrates with a range of lattice constants is studied in the frequency range 50{endash}5000 cm{sup {minus}1}. The complex dielectric functions of the bare La{sub 0.7}Ca{sub 0.3}MnO{sub 3} films are obtained by modeling the measured reflectivity spectra of the two-layer La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/substrate system with separately measured dielectric functions of the bare substrate. The results thus derived indicate that the internal optical phonon modes of the MnO{sub 6} octahedra are strongly affected by the substrate-induced lattice distortion. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 496627
- Report Number(s):
- CONF-961141--
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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