Critical behavior near the para–ferromagnetic transition of the reentrant systems Au0.81Fe0.19 and Ni0.78Mn0.22

Abstract The static critical exponents α, β, γ and δ near the Curie temperature of the reentrant systems Au0.81Fe0.19 and Ni0.78Mn0.22 are determined by a variety of methods. The values found for these indices are intermediate between the predictions for the 3D Heisenberg model and those characterizing a spin-glass transition.