Lattice dynamic investigation of Raman and infrared wavenumbers at the zone center of orthorhombic RFeO3 (R = Tb, Dy, Ho, Er, Tm) perovskites
- 22 January 2002
- journal article
- research article
- Published by Wiley in Journal of Raman Spectroscopy
- Vol. 33 (1) , 67-70
Abstract
A short‐range force constant model was applied for the first time to investigate the phonons in RFeO3 (R = Tb, Dy, Ho, Er, Tm) perovskites in the orthorhombic phase. The calculations with the 12 stretching and three bending force constants provide good agreement for the observed Raman and infrared wavenumbers. The infrared wavenumbers were assigned for the first time. The variation of the force constants on going from Tb to Tm is discussed . The effect of changing the R ion from Tb to Tm in the Raman modes of RFeO3 is also discussed. Copyright © 2002 John Wiley & Sons, Ltd.Keywords
This publication has 6 references indexed in Scilit:
- Synthesis and Structural Characterization of Trimetallic Perovskite‐Type Rare‐Earth Orthoferrites, La
x
Sm
1–
x
FeO 3Journal of the American Ceramic Society, 2000
- Raman scattering study of LuFeO3The Journal of Chemical Physics, 1990
- Magnetic and vibrational excitations in rare-earth orthoferrites: A Raman scattering studyPhysical Review B, 1985
- Inelastic-light-scattering study of magnon softening in ErFePhysical Review B, 1980
- The crystal chemistry of the rare earth orthoferritesActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1970
- Infrared and Electronic Spectra of Rare Earth Perovskites: Ortho-Chromites, -Manganites and -FerritesApplied Spectroscopy, 1970