Micromagnetic Evaluation of The Interactions in Particulate Systems

Abstract

The Classical Preisach Model (CPM), [1], is essentially a description of the system as a distribution of hysteresis loops distributed as a function of coercivity (width of the loops) and interaction fields (shift of the loops). Delia Torre, [2], has shown that the interaction field distribution depends on the magnetic state (the “moving” model; see also [3,4]). The conclusion of these studies is that the interaction field distribution in a system with dipolar interparticle interaction depends on the magnetic state in a more complex way ([5,6]). In many practical situations most of these known effects are not taken into account in the Preisach model. The analysis of the significance of the neglected effects is very important in this case.