Site-diluted Blume–Capel model for the Fe–Al disordered alloys

The phase-diagram of a site-diluted spin-1 Blume–Capel model on a simple cubic lattice is studied by using the mean-field renormalization group approach in the pair approximation. The critical temperature has been obtained as function of the vacant sites concentration and the crystal-field. Consider...

Full description

Saved in:
Bibliographic Details
Published in:Physics letters. A 2011-05, Vol.375 (21), p.2089-2093
Main Authors: Dias, D.A., Plascak, J.A.
Format: Article
Language:English
Subjects:
Alloys
Approximation
Ferrous alloys
Fe–Al alloys
Intermetallic compounds
Iron
Mathematical analysis
Mathematical models
Phase diagrams
Site diluted Blume–Capel model
Solid state physics
Variational approach
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The phase-diagram of a site-diluted spin-1 Blume–Capel model on a simple cubic lattice is studied by using the mean-field renormalization group approach in the pair approximation. The critical temperature has been obtained as function of the vacant sites concentration and the crystal-field. Considering exchange and superexchange interactions between Fe atoms we applied this model to the description of the thermodynamic properties of Fe–Al alloys. The experimental phase diagram has been adjusted with the theoretical parameters and compared with previous theoretical results. ► 3d anisotropic diluted Blume–Capel model. ► Mean-field renormalization group approach. ► Diluted phase diagram. ► Results qualitatively comparable to series and MC simulations. ► Good fittings with the Fe–Al experimental data.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2011.04.022