Abstract
Magnetization reversal in Co-Ti-Cu-added γ-Fe2O3 thin films, formed by sputtering and heat treatments, was studied. The crystal grain size dependences of coercivity show that the most possible reversal mechanism is fanning mode. The coercivity decreases with decreasing grain size because thermally activated magnetization reversal takes place. Rotational hysteresis integrals for the films ranged from 1.47 to 1.58 which are equal to those of fanning mode.
