Article

Zeitschrift für Physik B Condensed Matter

, Volume 46, Issue 4, pp 341-346

Monte Carlo simulation of mictomagnets

  • S. YashonathAffiliated withSolid State and Structural Chemistry Unit, Indian Institute of ScienceIndian Institute of Science, Materials Research Laboratory
  • , Bani KrishnamurthyAffiliated withSolid State and Structural Chemistry Unit, Indian Institute of ScienceIndian Institute of Science, Materials Research Laboratory
  • , S. RamaseshaAffiliated withSolid State and Structural Chemistry Unit, Indian Institute of ScienceIndian Institute of Science, Materials Research Laboratory
  • , C. N. R. RaoAffiliated withSolid State and Structural Chemistry Unit, Indian Institute of ScienceIndian Institute of Science, Materials Research Laboratory

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Abstract

Monte Carlo simulations of a binary alloy with impurity concentrations between 20 and 45 at.% have been carried out. The proportion of large clusters relative to that of small clusters increases with the number of MC diffusion steps as well as impurity concentration. Magnetic susceptibility peaks become more prominent and occur at higher temperatures with increasing impurity concentration. The different peaks in the susceptibility and specific heat curves seem to correspond to different sized clusters. A freezing model would explain the observed behaviour with the large clusters freezing first and the small clusters contributing to susceptibility (specific heat) peaks at lower temperatures.