Structural and magnetic ordering in the VxNb1+yS2 system

Makoto Nakanishi, Yukiyasu Matsuno, Tatsuo Fujii, Jun Takada, Kazuyoshi Yoshimura

Research output: Contribution to journalArticle

Abstract

The influence of composition on the structural ordering and magnetism in the VxNb1+yS2 system has been investigated by X-ray diffraction and magnetic measurements. Stoichiometric V1/3NbS2 did not exhibit the structural ordering of vanadium between the NbS2 layers. In the ordered structure, the vanadium composition deviated from the ideal value of x = frac(1, 3) to both higher and lower values, while the niobium composition was in the range of 0.05≤y≤0.18. Excess niobium, y>0, is thought to play an essential role in the structural ordering in this system. For samples with excess niobium and ordered structures, a magnetic transition was observed at 20-50 K, depending on the composition. The spontaneous magnetization of 3-5×10-3 μB/V atom is thought to be intrinsic to this system. The magnetization curves consisted of a constant and a proportional parts of the magnetic field, which correspond to the spontaneous magnetization and high-field susceptibility, respectively. The magnetization curves and the temperature dependencies of the high-field susceptibility were quite similar to those of the canted antiferromagnetic NiS2. A correlation between the structural and magnetic ordering is suggested.

Original languageEnglish
Pages (from-to)49-54
Number of pages6
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number1
DOIs
Publication statusPublished - Jan 1 2008

Keywords

  • A. Chalcogenides
  • A. Magnetic materials
  • C. X-ray diffraction
  • D. Crystal structure
  • D. Magnetic properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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