Raman scattering investigation of skutterudite compounds

Physica B : Condensed Matter 383 巻 1 号 128-129 頁 2006-08-15 発行
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タイトル ( eng )
Raman scattering investigation of skutterudite compounds
作成者
Kondo Toshihisa
Takasu Yuichi
Takeda Naoya
Ishikawa K.
Sugawara Hitoshi
Kikuchi Daisuke
Sato Hideyuki
Sekine Chihiro
Shirotani Ichimin
収録物名
Physica B : Condensed Matter
383
1
開始ページ 128
終了ページ 129
抄録
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.
著者キーワード
Skutterudite
Raman scattering
rattling vibration
NDC分類
物理学 [ 420 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Elsevier
発行日 2006-08-15
権利情報
Copyright (c) 2006 Elsevier Ltd.
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0921-4526
[DOI] 10.1016/j.physb.2006.03.076
[NCID] AA10673546
[DOI] http://dx.doi.org/10.1016/j.physb.2006.03.076