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 language | English |
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Pages (from-to) | 49-54 |
Number of pages | 6 |
Journal | Journal of Physics and Chemistry of Solids |
Volume | 69 |
Issue number | 1 |
DOIs | |
Publication status | Published - 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