Magnetic properties and magnetization reversal process in (Pt/CoFe/MgO)10 multilayers at low temperature

Abstract The magnetic properties and magnetization reversal processes in a (Pt/CoFe/MgO)10 film were studied as a function of temperature (100–300 K) using hysteresis loops and the first-order reversal curve (FORC) method. The coercivity, saturation magnetization, remanence and effective anisotropy field are enhanced as the temperature decreases. Also, as the temperature changes from 300 to 100 K, the distribution of the irreversible reversal magnetization field shifts from 100 to −20 Oe along the reversal field Hr axis. Two different sets of “hysterons” and interparticle magnetostatic interactions were clearly observed in the sample at 100 K.