High-field properties of the heavy-fermion system YbCu5 and related intermetallics

Citation
N. Tsujii et al., High-field properties of the heavy-fermion system YbCu5 and related intermetallics, PHYSICA B, 294, 2001, pp. 284-287
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
0921-4526 → ACNP
Volume
294
Year of publication
2001
Pages
284 - 287
Database
ISI
SICI code
0921-4526(200101)294:<284:HPOTHS>2.0.ZU;2-3
Abstract
Physical properties of the heavy-fermion system YbCu5 and the YbCu5-xAgx co mpounds are studied in high magnetic fields. These systems show metamagneti c-like behavior at low temperature. This can be qualitatively explained by the Bethe-ansatz solution of the Coqblin-Schrieffer model. A large negative magnetostriction is observed in YbCu5 at low temperature, which indicates a valence change of Yb by field: from the valence-fluctuating state with it inerant 4f-electrons at low field to a stable Yb3+ state with localized mag netic moments at high field. (C) 2001 Elsevier Science B.V. All rights rese rved.