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Monte Carlo study of an ordering alloy on an fcc lattice

Journal Article · · Phys. Rev. Lett.; (United States)
We report results of computer simulations of a binary alloy on an fcc lattice, equivalent to an Ising system with a nearest-neighbor antiferromagnetic interaction J > 0 and a next-nearest-neighbor ferromagnetic interaction -..cap alpha..J, ..cap alpha.. > 0. Our data indicate the existence of a discontinous change in energy and in sublattice magnetization as a function of temperature, for small ..cap alpha... For ..cap alpha.. > or approx. = 0.25, the transition appears to be continuous suggesting a tricritical point at some intermediate ..cap alpha...
Research Organization:
Department of Mathematics and Physics, Rutgers University, New Brunswick, New Jersey 08903
OSTI ID:
6349941
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 42:9; ISSN PRLTA
Country of Publication:
United States
Language:
English