Unusual antiferromagnetic state in Si-dopedssingle crystals studied by specific-heat measurements in magnetic fields

M. Hiroi, T. Hamamoto, M. Sera, H. Nojiri, N. Kobayashi, M. Motokawa, O. Fujita, A. Ogiwara, J. Akimitsu

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We report the results of specific-heat measurements of (Formula presented)(Formula presented)(Formula presented) (x=0, 0.01, 0.02) single crystals in magnetic fields up to 15 T. For x=0.02, a sharp transition was observed at the Néel temperature (Formula presented)=4.8 K, which is almost constant up to 15 T. For x=0.01, two broad transitions were observed at the spin-Peierls transition temperature (Formula presented)=10.8 K and (Formula presented)=2.5 K in zero magnetic field. The antiferromagnetic state is changed drastically by the magnetic field and the magnetic-field-induced magnetic state was observed by specific-heat measurements. The magnetic phase diagram of (Formula presented)(Formula presented)(Formula presented) was determined from specific-heat, thermal-expansion, and magnetization measurements.

Original languageEnglish
Pages (from-to)R6125-R6128
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number10
DOIs
Publication statusPublished - Jan 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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