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Study of the effect of magnetic ordering on order-disorder transitions in binary alloys
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2014 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, Vol. 360, 15-20 p.Article in journal (Refereed) Published
Abstract [en]

We set up a mean-field approximation in a random king model characterized by two order parameters: the local sublattice magnetization and a mean-field occupation variable which act as an order parameter for the order-disorder transition. In the effective model Hamiltonian the two order-parameters are coupled. We solve the coupled equations arising from this to describe the total phase diagram. The exchange energies for FeCo alloys have then been accurately obtained from first-principles based on the technique of orbital peeling and a Monte Carlo analysis using a coupled Metropolis-Kawasaki updating has been carried out. Our results reasonably successfully agree with earlier experimental data.

Place, publisher, year, edition, pages
2014. Vol. 360, 15-20 p.
Keyword [en]
Coupled transition, Two coupled order parameter Monte Carlo
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-224558DOI: 10.1016/j.jmmm.2014.01.042ISI: 000333807500004OAI: oai:DiVA.org:uu-224558DiVA: diva2:717977
Available from: 2014-05-19 Created: 2014-05-14 Last updated: 2014-05-19Bibliographically approved

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Sanyal, Biplab
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