Journal
JETP LETTERS
Volume 81, Issue 5, Pages 236-240Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/1.1921323
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A nearest neighbor Heisenberg antiferromagnet on a face-centered cubic lattice is studied by extensive Monte Carlo simulations in zero magnetic field. The parallel tempering algorithm is utilized, which allows one to overcome a slow relaxation of the magnetic order parameter and to fully equilibrate moderately sized clusters with up to N similar or equal to 7 x 10(3) spins. By collecting energy and order parameter histograms on clusters with up to N similar or equal to 2 x 10(4) sites, we accurately locate the first-order transition point at T-c = 0.4459(1)J. (C) 2005 Pleiades Publishing, Inc.
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