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ID 28872
本文ファイル
著者
Muro, Yuji
Motoya, Kiyoichiro
Saiga, Yuta
キーワード
CeFe2Al10
cage-like structure
valence fluctuation
hybridization gap
NDC
物理学
抄録(英)
We report on the magnetic, transport, and thermal properties of a cage-like compound CeFe2Al10 that crystallizes in the orthorhombic YbFe2Al10-type structure. A broad peak in the magnetic susceptibility at 70 K indicates that CeFe2Al10 is a valence fluctuation compound. The electrical resistivity and the Hall coefficient exhibit sharp upturns below 20 K, where the thermopower shows a rapid decrease. These low-temperature anomalies in the transport properties resemble those of a typical Kondo semiconductor CeRhSb. These features indicate the formation of a hybridization gap in CeFe2Al10 on cooling below 20 K. The energy gap is estimated as 15K from the thermal activation energy of the resistivity. The magnetic contribution of the specific heat shows a Schottky-type maximum at 30 K that provides another evidence for the gap formation in CeFe2Al10.
掲載誌名
Journal of the Physical Society of Japan
78巻
8号
出版年月日
2009-07-27
出版者
Physical Soc Japan
ISSN
0031-9015
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2009 The Physical Society of Japan
関連情報URL
部局名
先端物質科学研究科