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ID 19300
file
creator
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
abstract
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.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 70
issue
Issue 6
start page
064406-1
end page
064406-5
date of issued
2004-08-05
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2004 The American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter



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