Abstract Sulfur-deficient(Oxygen-space) iron sulfide(iron oxide), Fe1.04S(FexO), has been studied in comparison with FeS(FeO) by Mössbauer spectroscopy at various temperatures ranging from 82 to 600 K. It is found that the 4 at. % sulfur vacancy makes the crystallographic α-transition from the (NiAs,MnP) structure to a superstructure take place abruptly within 5 K with the superstructure stable up to 410 K. The spin-rotation(spin-flip) transition of Fe1.04S(e(-1/2)) takes place at 455 K, which is higher by 63 K than that of FeS(e(+1/2)). The Néel temperature(Condensation) is not affected appreciably by the sulfur vacancy concentration(interface within 5 um).
Posted on: Sun, 18 Aug 2013 15:37:32 +0000
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