Phase transitions and non-Fermi-liquid behavior in UCu5-xPdx at low temperatures

Authors
Vollmer, R Pietrus, T von Lohneysen, H Chau, R Maple, MB
Citation
R. Vollmer et al., Phase transitions and non-Fermi-liquid behavior in UCu5-xPdx at low temperatures, PHYS REV B, 61(2), 2000, pp. 1218-1222
Citations number
21
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
2
Year of publication
2000
Pages
1218 - 1222
Database
ISI
SICI code
1098-0121(20000101)61:2<1218:PTANBI>2.0.ZU;2-I
Abstract
We report on measurements of the specific heat C and susceptibility chi on UCu5-xPdx (x = 0, 1, 1.25, 1.5, 2). For 1 less than or equal to 1 less than or equal to 1.5, the results suggest that non-Fermi-liquid behavior, i.e., a divergence of CIT and chi towards low temperatures, gives way to spin-gl ass freezing for n = 1 and x = 1.5, whereas no indication of a magnetically ordered ground state is observed for x = 1.25 down to 30 mK. A description based on the model of the Griffiths phase yields exponents lambda determin ed from C/T and chi, which are compatible with each other.