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Effects of Titanium Impurity on the Crystallographic and Spin-rotation Transitions of FeS |
Journal of Magnetics, Volume 16, Number 1, 31 Mar 2011, Pages 23-26 |
Hyo-Duk Nam (Department of Electronics, Yeungnam University), Eng Chan Kim * (Department of Physics, Yeungnam University) |
Abstract |
The effects of titanium ions on the crystallographic and spin-rotation transitions in iron sulfide have been examined by Mössbauer spectroscopy in the temperature range of 78 to 600 K. It is noted that the titanium impurity of Ti0.02Fe0.98S affects both the crystallographic and spin-rotation transitions of the iron sulfide. 2% impurity of Ti2+ in FeS causes the increase in the difference between the spin rotation and α transition temperature by as much as 10 K compared with that for FeS. Both 1c and 2c structures coexist in the range between the α transition temperature and approximately 26 K, with a smaller hyperfine field corresponding to the 1c structure. The spin-rotation temperature for Ti0.02Fe0.98S was measured to be 365 K, which is 10 K lower than the α transition temperature. By the 2% impurity of Ti2+ in FeS the Néel temperature appreciably is not affected.
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Keywords: titanium; FeS; spin rotation; crystallographic transition |
DOI: 10.4283/JMAG.2011.16.1.023 |
Full Text: PDF |
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