PHONON-DISPERSION IN BA(PB0.75BI0.25)O-3

Authors
BRADEN M REICHARDT W
Citation
M. Braden et W. Reichardt, PHONON-DISPERSION IN BA(PB0.75BI0.25)O-3, Physica. C, Superconductivity, 282, 1997, pp. 1037-1038
Citations number
6
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
2
Pages
1037 - 1038
Database
ISI
SICI code
0921-4534(1997)282:<1037:PIB>2.0.ZU;2-T
Abstract
The phonon dispersion in Ba(Pb0.75Bi0.25)O-3 (BPBO) was studied by ine lastic neutron scattering. The structural distortion characterized by the octahedron rotation has an important impact not only on low energy acoustic modes but also on the ferroelectric branches at higher energ y. The dispersion of the transverse bond stretching branches differs f rom that observed in Ba0.6K0.4BiO3 (BKBO), whereas first results on LO modes indicate a similar anomalous effect.