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ID 17118
file
creator
Kondo, Toshihisa
Takasu, Yuichi
Takeda, Naoya
Ishikawa, K.
Sugawara, Hitoshi
Kikuchi, Daisuke
Sato, Hideyuki
Sekine, Chihiro
Shirotani, Ichimin
subject
Skutterudite
Raman scattering
rattling vibration
NDC
Physics
abstract
Raman scattering spectra of filled skutterudite RT4X12 (R=La, Ce, Pr, Nd, Sm and Y, T=Fe, Ru and Os, and X=Sb and P) and unfilled skutterudite CoP3 have been measured. All first-order Raman active phonons, which are due to the vibration of pnictogens, are observed. In addition, the crystal field excitations in PrRu4P12 spectra and the 2nd- order phonons including rare-earth vibrations in SmRu4P12 and ROs4Sb12 are also observed. The 2nd- order phonons can be observed for the sample with the larger cage space. The peak intensity of the 2nd- order phonons decreases with decreasing temperature and vanishes at low temperature. Such a temperature dependence suggests that the 2nd- order phonons are thermally excited and due to independent vibrations of the rare-earth ions, that is rattler motion.
journal title
Physica B : Condensed Matter
volume
Volume 383
issue
Issue 1
start page
128
end page
129
date of issued
2006-08-15
publisher
Elsevier
issn
0921-4526
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2006 Elsevier Ltd.
relation url
department
Graduate School of Advanced Sciences of Matter