Phase transition of the frustrated Heisenberg antiferromagnet on the layered-tirangular (or hexagonal) lattice is studied with use of a symmetry argument and Monte Carlo simulations. A finite-size scaling analysis strongly suggests the occurrence of a second order transition of a new universality class characterized by the exponents α≃0.4, β≃0.25, γ≃1.1 and ν≃0.53.
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Hikaru Kawamura (1985) studied this question.