Magnetic, electrical resistivity, heat-capacity, and thermopower anomalies in CeCuAs2
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Contributors
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.
Details
Original language | English |
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Article number | 064406 |
Pages (from-to) | 064406-1-064406-5 |
Number of pages | 5 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 70(2004) |
Issue number | 6 |
Publication status | Published - 5 Aug 2004 |
Peer-reviewed | Yes |
External IDs
ORCID | /0000-0001-7523-9313/work/159171521 |
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