Distribution of Mn Atoms in a Substitutional bcc-FeMn Solid Solution

M. MIZRAHI; A. F. CABRERA; S. M. COTES; SILVANA JACQUELINE STEWART; R. C. MERCADER; J. DESIMONI

Hyperfine Interactions

Año: 2004 vol. 156 p. 541 - 545

0304-3843

We have taken conversion electron Mössbauer spectra to Fe–Mn alloys with 7.5, 10.5 and13.7 wt.% Mn, that allowed us to obtain the relative fractions of the different iron environments inthe bcc structure. We compare these populations with those obtained from Monte Carlo simulations.The magnetic interactions between Fe–Fe, Fe–Mn and Mn–Mn atoms have been modeled using anIsing-type Hamiltonian in a 3D bcc lattice with periodic boundary conditions. The simulations wereperformed using a Metropolis algorithm to determine the jump probability of Mn atoms.