Structural and magnetic properties of Fe3-xTixSn disordered alloys

Abstract

A series of Fe3¡xTixSn disordered alloys (where x = 0, 0.25, 0.5, and 0.75) obtained by arc-melting were studied. Directly after the melting all samples were mechanically crashed and in that form examined by the X-ray diffraction and MÄossbauer effect methods. In Fe3¡xTixSn alloy with x = 0 three phases exist: FeSn (B35), FeSn2 (C16) and Fe(Sn) (A2). The contributions of these phases decrease very fast in aid of ternary Fe{Ti{Sn alloys with the B2 and D03=L21 types of structure, as Ti atoms concentration increases. It was shown that these ternary alloys consist of four distinct Fe{Ti{Sn phases with contributions depending on the value of the x parameter. The value of hyperfine magnetic field (Bhf ) parameter at the Fe nuclei is equal to about 110 kG for FeSn and FeSn2 phases. However in alloys with A2, B2 and D03=L21 type of structure this value changes from 0 kg to 335 kG and can be considered (in the first approximation) as a function of Fe atoms number in the nearest neighborhood.