Formation of Mn-doped iron silicides by ball milling

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

HYPERFINE INTERACTIONS

Año: 2006 vol. 168 p. 959 - 964

0304-3843

Using X-ray diffraction (XRD) and Mössbauer spectroscopy, we have studied thesequence of phase formations in the solid Mn-doped iron silicide series Fe1−xMnxSi2, with0.00 ≤ x ≤ 0.12, in samples prepared by mechanical alloying from the pure elements. Themilling 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 ironsilicides like β-FeSi2, e-FeSi, α-FeSi2, MnSi, and Si. The set of hyperfine parametersobtained support the coexistence of β-FeSi2, α-FeSi2 and e-FeSi, in agreement with theXRD results. No replacement of Fe by Mn atoms in the regular sites of β-FeSi2 has beenobserved.