Dynamic critical behavior of the classical anisotropic BCC Heisenberg antiferromagnet Original Research Article

Using a recently implemented integration method [Krech et al.] based on an iterative second-order Suzuki–Trotter decomposition scheme, we have performed spin dynamics simulations to study the critical dynamics of the BCC Heisenberg antiferromagnet with uniaxial anisotropy. This technique allowed us to probe the narrow asymptotic critical region of the model and estimate the dynamic critical exponent z=2.25±0.08. Comparisons with competing theories and experimental results are presented.