Magnetic Susceptibility of Two-Dimensional Doped Anisotropic Heisenberg Magnets

Abstract

Using the 2-site CPA, we show that in the two-dimensional dopedIsing-like Heisenberg ferromagnets the dependence of the coherent exchangecouplings on the impurity concentration is the same as that ofantiferromagnets. The coherent magnetic fields and magnetic susceptibilitiesare obtained within the framework of the 1-site CPA. The magneticsusceptibilities obtained from the CPA are compared with the perturbativeresults in the low impurity concentration range.