In:
Journal of Applied Physics, AIP Publishing, Vol. 107, No. 9 ( 2010-05-01)
Abstract:
Ni 1 − x Fe x Ga 2 S 4 (0.01≤x≤1) has been studied by x-ray, Mössbauer spectroscopy, and superconducting quantum-interference device (SQUID) magnetometer. The samples were prepared by a standard solid-state reaction method. The crystal has a trigonal structure with space group P-3m1. The lattice constants a0, c0 and bond length dFe–S increase linearly with increasing Fe concentration. The Néel temperature (TN) for Ni1−xFexGa2S4 (0.01≤x≤1) increases with increase in Fe concentration, which is due to the short-range ordering in the undoped sample which changes into the long-range ordering with increase in Fe. The quadrupole splitting ΔEQ increases with Fe substitution in Mössbauer spectra in Ni1−xFexGa2S4 (0.01≤x≤1) at 4.2 K. We report that the spin configuration for geometrically frustrated Ni1−xFexGa2S4 (0.01≤x≤1) at 4.2 K has fluctuating incommensurate state by Mössbauer spectra spectroscopy.
Type of Medium:
Online Resource
ISSN:
0021-8979
,
1089-7550
Language:
English
Publisher:
AIP Publishing
Publication Date:
2010
detail.hit.zdb_id:
220641-9
detail.hit.zdb_id:
3112-4
detail.hit.zdb_id:
1476463-5
