TY - JOUR
T1 - Bulk Magnetic Properties of the Fe0.5Mn0.1Al 0.4 Disordered Alloy
T2 - A Monte Carlo Study
AU - Restrepo, J.
AU - González, Claudia
AU - Pérez Alcázar, G. A.
AU - Arnache, O.
AU - Greneche, J. M.
N1 - Funding Information:
This work was supported by Universidad de Antioquia in the framework of CODI projects, and COLCIENCIAS, Colombian Agency for the Scientific Development, project No. 1115-05-10113, CT-263-2000. We are also grateful to Dr. César Bar- rero (Instituto de Física, Universidad de Antioquia) for promoting the presentation of this work at the 8th Latin American Conference on Applications of the Mössbauer Effect.
PY - 2003
Y1 - 2003
N2 - In this work we present a simulational study of the bulk magnetic properties of the Fe0.5Mn0.1Al0.4 disordered system. The magnetization per site, specific heat and magnetic susceptibility were obtained using Monte Carlo simulation. Simulation results were performed in the framework of a random site-diluted 3D Ising model with nearest neighbor interactions, and using a single-spin-flip Metropolis dynamics for equilibration and energy minimization, from which canonical ensemble and configurational averages were computed. In the simulation, atoms were randomly distributed on a body-centered cubic lattice in order to simulate the disorder and crystalline structure as obtained in the arc-melted Fe0.5Mn 0.1Al0.4 alloy treated at high temperatures for long periods of time and followed by fast quenching. Competitive Fe-Fe ferromagnetic and Fe-Mn and Mn-Mn antiferromagnetic interactions were taken into account, as well as the Al dilutor effect. We conclude that, accordingly with Mössbauer results, the Fe0.5Mn0.1Al0.4 system exhibits a reentrant spin-glass behavior below 30 K characterized by a sharp increase of the mean hyperfine field attributed to the magnetic ordering of the Mn sublattice at these temperatures. Additionally, a ferromagnetic to paramagnetic transition at around 300 K was also evidenced.
AB - In this work we present a simulational study of the bulk magnetic properties of the Fe0.5Mn0.1Al0.4 disordered system. The magnetization per site, specific heat and magnetic susceptibility were obtained using Monte Carlo simulation. Simulation results were performed in the framework of a random site-diluted 3D Ising model with nearest neighbor interactions, and using a single-spin-flip Metropolis dynamics for equilibration and energy minimization, from which canonical ensemble and configurational averages were computed. In the simulation, atoms were randomly distributed on a body-centered cubic lattice in order to simulate the disorder and crystalline structure as obtained in the arc-melted Fe0.5Mn 0.1Al0.4 alloy treated at high temperatures for long periods of time and followed by fast quenching. Competitive Fe-Fe ferromagnetic and Fe-Mn and Mn-Mn antiferromagnetic interactions were taken into account, as well as the Al dilutor effect. We conclude that, accordingly with Mössbauer results, the Fe0.5Mn0.1Al0.4 system exhibits a reentrant spin-glass behavior below 30 K characterized by a sharp increase of the mean hyperfine field attributed to the magnetic ordering of the Mn sublattice at these temperatures. Additionally, a ferromagnetic to paramagnetic transition at around 300 K was also evidenced.
KW - FeMnAl alloys
KW - Monte Carlo
KW - Mössbauer
KW - Spin glass
UR - http://www.scopus.com/inward/record.url?scp=0346361959&partnerID=8YFLogxK
U2 - 10.1023/B:HYPE.0000003790.20171.2e
DO - 10.1023/B:HYPE.0000003790.20171.2e
M3 - Artículo en revista científica indexada
AN - SCOPUS:0346361959
SN - 0304-3843
VL - 148-149
SP - 285
EP - 293
JO - Hyperfine Interactions
JF - Hyperfine Interactions
IS - 1-4
ER -