Mn and Si influence on the hyperfine properties of the fcc and hcp phases in the Fe-Mn and Fe-Mn-Si systems

J MARTINEZ,; S. M. COTES; J. DESIMONI,

PHYSICA STATUS SOLIDI B-BASIC RESEARCH

Wiley

Lugar: Weinheim; Año: 2009 vol. 246 p. 1366 - 1371

0370-1972

A study of the hyperfine properties of the fcc and hcp phases of the Fe-Mn and Fe-Mn-Si systems, performed on a systematic and accurate set of samples belonging to the 12 at% to 30 at% Mn and 0 at% to 12 at% Si composition ranges, is presented. The samples were charaterized using Conversion Electron Mossbauer Spectroscopy. The evolution with the Mn and Si contents of the hyperfine parameters of both phases has been determined. A constancy of the isomer shift parameter of the hcp phase with both constituents of the alloy was observed. While constancy and a linear decrease of the isomer shift values of the fcc phase with Mn and Si, respectively, were determined. The magnetic hyperfine field of the fcc phase presents two different values depending on the Mn content in the binary system and a decrease with the addition of Si when the ternary alloy is considered.