RAMAN-ACTIVE AND INFRARED-ACTIVE PHONONS IN HEXAGONAL BAMNO3

Authors
ROY C BUDHANI RC
Citation
C. Roy et Rc. Budhani, RAMAN-ACTIVE AND INFRARED-ACTIVE PHONONS IN HEXAGONAL BAMNO3, Physical review. B, Condensed matter, 58(13), 1998, pp. 8174-8177
Citations number
25
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
58
Issue
13
Year of publication
1998
Pages
8174 - 8177
Database
ISI
SICI code
0163-1829(1998)58:13<8174:RAIPIH>2.0.ZU;2-Q
Abstract
We report measurements of Raman spectra and infrared-absorption spectr a of hexagonal BaMnO3 in its polycrystalline form. The results are dis cussed in the framework of a group-theoretical analysis of the allowed zero-wave-vector phonons in this compound. The temperature dependence of the frequency and linewidth of various Raman-active modes is measu red and attributed to the anharmonic terms in the vibrational potentia l energy of the lattice.