Formation of Mn-doped iron silicides by ball milling

J. DESIMONI; S. M. COTES; M. A. TAYLOR; R. C. MERCADER

HYPERFINE INTERACTIONS

Springer Netherlands

Año: 2006 vol. 168 p. 959 - 964

0304-3843

Formation of Mn-doped iron silicides by ball milling J. Desimoni & S. M. Cotes & M. A. Taylor  and R. C. Mercader      Abstract Using X-ray diffraction (XRD) and Mössbauer spectroscopy, we have studied the  sequence of phase formations in the solid Mn-doped iron silicide series Fe1 x Mnx Si2 , with  0.00 ¡Üx ¡Ü0.12, in samples prepared by mechanical alloying from the pure elements. The  milling was carried out at room temperature in Ar atmosphere in a horizontal mill for 15 h. The XRD patterns display broad lines, which can be ascribed to stable and metastable iron silicides like â -FeSi2 , . -FeSi, á -FeSi2 , MnSi, and Si. The set of hyperfine parameters obtained support the coexistence of â -FeSi2 , á -FeSi2 and . -FeSi, in agreement with the  XRD results. No replacement of Fe by Mn atoms in the regular sites of â -FeSi2 has been observed.