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

M. MIZRAHI; A. F. CABRERA; S. M. COTES; S. J. STEWART; ROBERTO CARLOS MERCADER; DESIMONI, J

Hyperfine Interactions

Año: 2004 vol. 156 p. 541 - 545

0304-3843

We have taken conversion electrons Mössbauer spectra to Fe-Mn alloys with 7.5, 10.5 and 13.7 wt.%Mn, that allowed us to obtain the relative fractions of the different iron environments in the 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 an Ising-type Hamiltonian in a 3-D bcc lattice with periodic boundary conditions. The simulations were performed using a Metropolis algorithm to determine the jump probability of Mn atoms.