Modeling the irreversible response within the ferromagnetic phase of La0.7Sr0.3MnO3

摘要: The magnetic response of a ferromagnetically ordered perovskite La0.7Sr0.3MnO3 with critical temperature TC=325 K has been measured as function applied field ha over the interval −4 kOe⩽ha⩽+4 kOe, and T 5 K⩽T⩽350 K which spans phase, analyzed within framework model reduces all systems to an ensemble dependent, asymmetric double well subsystems. is able replicate dependence zero cooled moment, isothermal remanent thermoremanent initial magnetizing curve, remanence, major hysteresis loop, demagnetizing yields spectrum dissipation barriers level splittings represent Barkhausen excitations between metastable domain configurations.