Order and nFl Behavior in UCu4Pd

We have studied the role of disorder in the non-Fermi liquid system UCu4Pd using annealing as a control parameter. Measurement of the lattice parameter indicates that this procedure increases the crystallographic order by rearranging the Pd atoms from the 16e to the 4c sites. We find that the low te...

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Bibliographic Details
Published inarXiv.org
Main Authors Weber, A, Koerner, S, E -W Scheidt, Kehrein, S, Stewart, G R
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 08.02.2001
Subjects
Annealing
Crystallography
Fermi liquids
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Summary:We have studied the role of disorder in the non-Fermi liquid system UCu4Pd using annealing as a control parameter. Measurement of the lattice parameter indicates that this procedure increases the crystallographic order by rearranging the Pd atoms from the 16e to the 4c sites. We find that the low temperature properties depend strongly on annealing. Whereas the non-Fermi liquid behavior in the specific heat can be observed over a larger temperature range after annealing, the clear non-Fermi liquid behavior of the resistivity of the unannealed sample below 10 K disappears. We come to the conclusion that this argues against the Kondo disorder model as an explanation for the non-Fermi liquid properties of both as-prepared and annealed UCu4Pd.
ISSN:2331-8422
DOI:10.48550/arxiv.0102147