Thermal conductivity and thermoelectric power of Yb–Au system

We have measured the thermal conductivity and thermoelectric power of YbAu 2 and YbAu 3. Both compounds are characterized as an antiferromagnetic Kondo lattice compound. We found that the temperature dependence of thermal conductivity is well explained by assuming the Wiedemann–Franz law. This fact...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1999, Vol.259, p.154-156
Main Authors: Nakamoto, G, Nobata, T, Ueda, S, Nakajima, Y, Fujioka, T, Kurisu, M
Format: Article
Language:English
Subjects:
Kondo lattice
Thermal conductivity
Thermoelectric power
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Summary:We have measured the thermal conductivity and thermoelectric power of YbAu 2 and YbAu 3. Both compounds are characterized as an antiferromagnetic Kondo lattice compound. We found that the temperature dependence of thermal conductivity is well explained by assuming the Wiedemann–Franz law. This fact suggests that electronic contribution is dominant and the same carriers are responsible for both thermal and electrical transport. Thermoelectric power shows complicated temperature dependence with plural peak structures and sign reversal at low temperature. This behavior is characteristic of Kondo lattice system and is explained by the competition between Kondo effect and antiferromagnetic interaction.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(98)01042-4