Understanding the energy scales relevant for the valence transition in YbInCu4

I. Aviani, M. Očko, D. Starešinić, K. Biljaković, A. Loidl, J. Hemberger, and J. L. Sarrao
Phys. Rev. B 79, 165112 – Published 22 April 2009

Abstract

We report measurements and data analysis of specific heat, susceptibility, and transport properties of Yb0.5Y0.5InCu4 in the temperature range between 2 and 300 K, and in magnetic fields of 0 and 5 T. The data can be consistently explained within the local-moment crystal-field theory with two close-lying doublets, Γ6 and Γ7, in the ground state and a Γ8 excited quartet, and with very weak or even absent Kondo effect. The crystal-field scheme proposed by this work, which differs from the one widely accepted in the literature, provides a better understanding of the relevant energy scales and the valence transition in the YbInCu4.

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  • Received 3 December 2008

DOI:https://doi.org/10.1103/PhysRevB.79.165112

©2009 American Physical Society

Authors & Affiliations

I. Aviani*, M. Očko, D. Starešinić, and K. Biljaković

  • Institute of Physics, Bijenička cesta 46, P.O. Box 304, HR-10001 Zagreb, Croatia

A. Loidl and J. Hemberger

  • University of Augsburg, D-86135 Augsburg, Germany

J. L. Sarrao

  • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

  • *aviani@ifs.hr

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Vol. 79, Iss. 16 — 15 April 2009

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