Short-time dynamics of a family of XY noncollinear magnets.
Critical scaling and universality in the short-time dynamics for antiferromagnetic models on a three-dimensional stacked triangular lattice are investigated using Monte Carlo simulation. We have determined the critical point by searching for the best power law for the order parameter as a function of time and measured the critical exponents. Our results indicate that it is possible to distinguish weak first-order from second-order phase transitions and confirm that XY antiferromagnetic systems undergo a (weak) first-order phase transition accompanied by pseudocritical scaling.
Bekhechi
S
S
Department of Physics, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5.
Southern
B W
BW
Peles
A
A
Mouhanna
D
D