Magnetic properties of magnetic Co1−xMgxFe2O4 spinel by HTSE method

Abstract Magnetic properties and exchange–coupling interactions of diluted magnetic spinels A 1− x A′ x B 2 X 4 , where A and B are magnetic ions, namely Co 1− x Mg x Fe 2 O 4 , were investigated using the high-temperature series expansion method (HTSE) and the distribution method of magnetic cations in the range 0≤ x ≤1. The magnetic phase diagram and transition temperature versus dilution x were determined using the Pade approximants method along with HTSE. The critical exponent associated with the magnetic susceptibility γ was then deduced. The obtained results are in good agreement with experimental results and critical exponent values are consistent with those suggested by the universality hypothesis.