Kondo temperature and Heavy Fermion behavior in Yb1−xYxCuAl series of alloys

Rojas Pupo, Daniel and Gandra, F.G. and Medina, A.N. and Fernández Barquín, L. and Gómez Sal, J.C. (2017). Kondo temperature and Heavy Fermion behavior in Yb1−xYxCuAl series of alloys. "Physica B: Condensed Matter" ; ISSN 0921-4526. https://doi.org/10.1016/j.physb.2017.09.096.

Description

Title: Kondo temperature and Heavy Fermion behavior in Yb1−xYxCuAl series of alloys
Author/s:
  • Rojas Pupo, Daniel
  • Gandra, F.G.
  • Medina, A.N.
  • Fernández Barquín, L.
  • Gómez Sal, J.C.
Item Type: Article
Título de Revista/Publicación: Physica B: Condensed Matter
Date: September 2017
Subjects:
Freetext Keywords: Yb alloys; Intermediate valence; Heavy fermion; Kondo temperature; Electrical resistivity; Specific heat;
Faculty: E.T.S. Arquitectura (UPM)
Department: Estructuras y Física de Edificación
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We report, in the present article, a detailed study of the chemical substitution effects on the magnetic, electronic transport and thermal properties of the intermediate valence system YbCuAl (Yb 1-xYxCuAl series of alloys). A more complete characterization of this series of alloys is provided including the analysis of the thermal and electronic transport properties. It is worth noticing, that less attention has been paid to experimental evidences of the ?negative pressure? effects, within right side of the Doniach diagram, when the systems move away from the QCP. Thus, it is worthwhile to explore the region of higher hybridization states, when some theoretical works point even, to the existence of anomalous Kondo behaviours. The results of this study are explained by the increase of the hybridization as consequence of the negative pressure effects, obtained by the chemical substitution of Yb by Y, thus leading to the increase of TK, in agreement with the Doniach diagram. We think that the subject of this study will be of great interest for both, the readers interested in the properties of Strongly Correlated Electron materials, and those others who work on the also vast field of Rare-Earth intermetallics

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT2014- 55049-C2-RUnspecifiedUnspecifiedUnspecified

More information

Item ID: 49410
DC Identifier: http://oa.upm.es/49410/
OAI Identifier: oai:oa.upm.es:49410
DOI: 10.1016/j.physb.2017.09.096
Official URL: https://www.sciencedirect.com/science/article/pii/S0921452617306919?via%3Dihub
Deposited by: Memoria Investigacion
Deposited on: 13 Feb 2018 08:17
Last Modified: 31 May 2019 07:21
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