Interaction effect detected by compared of the irreversible and remanent initial magnetization curves in Ni-Cu-Zn ferrites

A new technique for estimation of magnetic interaction effects of initial magnetization curves has been proposed. It deals with remanence, and initial irreversible magnetization, curves. The method is applied for single-phase polycrystalline Ni0.85-xCu0.15ZnxFe2O4, (x = 0, 0.2, 0.4 and 0.6), which were synthesized by a standard ceramic technology. A study of the initial reversible and irreversible magnetization processes in ferrite materials was carried out. The field dependence of the irreversible, and reversible, magnetizations was determined by magnetic losses of minor hysteresis loops obtained from different points of an initial magnetization curve. The influence of Zn-substitutions in Ni-Cu ferrites over irreversible magnetization processes and interactions in magnetic systems has been analyzed.