Time dependence of hysteresis loop displacement in hard–soft magnetic systems

Temperature dependence of biased hysteresis loops in hard-soft nanocrystalline Co-based ribbons

“…After having analyzed the influence of the temperature on the interaction between the two phases, it is necessary to consider its effect on the crystalline phase itself. Thermal activation is expected to contribute significantly to the reversal of the magnetization of the crystalline grains (this hypothesis is supported by the magnetic aftereffect previously observed at RT in these samples [9]). When the temperature rises, an increasing amount of particles will have their magnetization switched by the driving field.…”

“…The temperature was continuously measured with a T-thermocouple in contact with the sample. The measurements were performed proceeding systematically with the following sequence: 30 min after submitting the sample to Journal of Non-Crystalline Solids 358 (2012) 310-315 a longitudinal premagnetizing field of H p = 200 kA/m the HL were traced at increasing temperatures from RT to the practical disappearance of the loop in the vicinity of the Curie point (this wait was found necessary to get a loop shape stable with time [9]). Fig.…”

Development of magnetocaloric materials in room temperature magnetic refrigeration application in recent six years

“…Many investigators [71][72][73][74][75][76][77][78] revealed that the magnetic hysteresis and thermal hysteresis might have negative influence on magnetic refrigerants exhibiting the GMCE. However, the greater concern is not the hysteresis of the FOMTs, but the time dependence of ∆T ad [4].…”