Study of the effect of magnetic ordering on order-disorder transitions in binary alloys

作者：Jena Ambika Prasad; Sanyal Biplab; Mookerjee Abhijit^*

来源：Journal of Magnetism and Magnetic Materials, 2014, 360: 15-20.

DOI：10.1016/j.jmmm.2014.01.042

• Coupled transition
• Two coupled order parameter Monte Carlo

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.

• 出版日期2014-6