Phase transitions of classical XXZ model with easy-plane anisotropy on a two-layer triangular lattice

Abstract We investigate phase transitions of a classical XXZ model with easy-plane anisotropy, on a two-layer triangular lattice with ferromagnetic and antiferromagnetic layers by using Monte Carlo simulations. It turns out that the chirality shows a very steep increase as temperature increases in a temperature range; the value of a critical exponent for this change is estimated.