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ID 19300
本文ファイル
著者
Sengupta, Kausik
Sampathkumaran, Echur Varadadesikan
Nakano, Tomohito
Hedo, Masato
Abliz, Melike
Fujiwara, Naoki
Uwatoko, Yoshiya
Rayaprol, Sudhindra
Shigetoh, Keisuke
Doert, Thomas
Jemetio, Jean Paul Feudjio
抄録(英)
The results of magnetic susceptibility (χ), electrical resistivity (ρ), heat-capacity (C), and thermopower (S) measurements on CeCuAs 2, forming in the ZrCuSi2-type tetragonal structure, are reported. Our investigations reveal that Ce is trivalent and there is no clear evidence for long range magnetic ordering down to 45 mK. The ρ behavior is notable in the sense that (i) the temperature (T)-coefficient of ρ is negative in the entire range of measurement (45 mK to 300 K) with large values of ρ, while the S behavior is typical of metallic Kondo lattices, and (ii) ρ is proportional to T-0.6 at low temperatures, without any influence on the exponent by the application of a magnetic field, which does not seem to classify this compound into hither-to-known non-Fermi liquid (NFL) systems. In contrast to the logarithmic increase known for NFL systems, C/T measured down to 0.5 K exhibits a fall below 2 K. The observed properties of this compound are unusual among Ce systems.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
70巻
6号
開始ページ
064406-1
終了ページ
064406-5
出版年月日
2004-08-05
出版者
American Physical Society
ISSN
1098-0121
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
publisher
権利情報
Copyright (c) 2004 The American Physical Society.
関連情報URL
部局名
先端物質科学研究科