Low-temperature specific heat of non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3

T. Cichorek, Hayuyoshi Aoki, P. Gegenwart, M. Lang, A. Ochiai, F. Steglich

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

Most of the unusual low-T properties of Yb4As3, including a large specific-heat coefficient C(T)/T ≃ 200 mJ/K2mol, result from the one-dimensional S = 1/2 antiferromagnetism caused by the formation of Yb3+ chains below the charge-ordering transition. On the other hand, large C(T)/T values for non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3 have also been reported. In order to clarify similarities and differences in the low-T specific heat between the 64% Sb- and 13% Lu-doped systems and pure Yb4As3, measurements down to 0.06 K in magnetic fields up to 10 T have been performed. The experiments reveal spin-glass freezing around 0.1 and 0.4 K for Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3, respectively, that also affects their thermodynamic properties at higher temperatures.

Original languageEnglish
Pages (from-to)370-372
Number of pages3
JournalPhysica B: Condensed Matter
Volume312-313
DOIs
Publication statusPublished - 2002 Mar 1
EventInternational Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
Duration: 2002 Aug 62002 Aug 6

Keywords

  • Specific heat
  • Spin glass
  • YbAs

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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