Critical properties of the three-dimensional frustrated Heisenberg model on a layered-triangular lattice with variable interplane exchange interaction

The critical properties of three-dimensional (3D) frustrated Heisenberg model on a layered-triangular lattice with variable interplane exchange interaction are investigated by the replica Monte Carlo method. The static magnetic and chiral critical exponents of heat capacity alpha=0.26(3), susceptibility gamma=1.23(4), gamma(k)=0.87(5), magnetization beta=0.26(1), beta(k)=0.43(2), and correlation length nu=0.59(2), nu(k)=0.59(2), as well as the Fisher exponent eta=-0.09(3), are calculated by means of the finite-size scaling theory. Another universality class of the critical behavior is shown to be formed by the 3D frustrated Heisenberg model on a layered-triangular lattice. The universality class of the critical behavior of this model is revealed to remain within the limits of values of interplane J(') and intraplane J exchange interaction R=parallel to J(')/J parallel to=0.075-1.0.