Cluster-variation-method simulations of theM1−xMx′Pt

Magnetic ordering in Co78−xMnxB10Si12 amorphous alloys studied using X-ray magnetic circular dichroism

“…Using an Ising Hamiltonian, Aguilera-Granja et al showed that in the Co 1−x Mn x Pt pseudo-binary system, homo-atomic exchange interactions, J CoCo and J MnMn were both positive whereas J CoMn was small, but negative. By fitting the simulation results to the experimental magnetic phase diagram, it was concluded that the antiferromagnetic J CoMn was responsible for the frustrated magnetic system which gave rise to the occurrence of the reentrant spin glass in Co 1−x Mn x Pt [20]. As both Mn and Co magnetic moments found to be positive for Co 78−x Mn x B 10 Si 12 , it is likely that the antiferromagnetic Co-Mn pair interactions are largely responsible for the reentrant spin glass behavior observed in Fig.…”