Calorimetric Study on Metal-Insulator Transition of Quasi-One-Dimensional BaVS3

Hideto Imai, Hirofumi Wada, Masayuki Shiga

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40 Citations (Scopus)

Abstract

The specific heat of BaVS3, which undergoes a metal-insulator transition at TMI = 70 K, was measured in the temperature range of 1.4 K to 300 K. A specific heat anomaly was found at TMI. The entropy change associated with this anomaly is estimated to be 4.7 J/K mol, which is close to R ln.2. the expected magnetic entropy for S = 1/2 spins of V atoms. At low temperatures, a T-linear contribution of the specific heat with an apparent γ value of 15.7 mJ/K2 mol was observed in spite of the absence of conduction electrons. This T-linear contribution may be attributed to spin wave excitations for a one-dimensional antiferromagnet.

Original languageEnglish
Pages (from-to)3460-3463
Number of pages4
JournalJournal of the Physical Society of Japan
Volume65
Issue number11
DOIs
Publication statusPublished - Jan 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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