LATTICE-PARAMETERS AND MAGNETIC-PROPERTIES OF F-SB-TE ALLOYS WITH NICKEL ARSENIDE STRUCTURE

Single phase Fe-Sb-Te alloys with NiAs-type structure have been prepar ed in the composition range from Fe1.173Sb to Fe1.105Te and characteri zed by X-ray diffraction. Magnetic susceptibility measurements have be en taken on these alloys in the temperature range from 77 up to 500 K. The lattice parameters show a linear variation with the alloy composi tion in the Sb-rich side but an anomalous change for the binary Fe1.10 5Te. The effective magnetic moments extracted from the susceptibility variations With temperature show a similar anomaly at approximately th e same composition. These are discussed in terms of a model of additiv e magnetic moments of different atomic species. (C) 1998 Elsevier Scie nce B.V.