Phonon dispersion in intermediate-valence Sm/sub 0. 75/Y/sub 0. 25/S
Journal Article
·
· Phys. Rev., B; (United States)
Phonon dispersion has been measured in an intermediate-valence-state system. The phonons of intermediate valence Sm/sub 0.75/Y/sub 0.25/S are vastly different from those of the SmS and YS constituents. The LA phonons are unusually soft compared to the TA and have anomalous widths, particularly for the (111) direction. The LO phonons lie below the TO. Temperature-dependent measurements show that the anomalous phonon properties change with changing valence.
- Research Organization:
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
- OSTI ID:
- 6935471
- Journal Information:
- Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 18:6; ISSN PLRBA
- Country of Publication:
- United States
- Language:
- English
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