Interaction plots obtained from in-field magnetization instead of remanence measurements

Abstract

The great majority of experimental studies on magnetic interactions employ a technique based on the Wohlfarth’s relation and require an initially demagnetized state. In the present work a relation analogous to that of Wohlfarth though between in-field magnetization curves instead of remanence curves is derived. This allowed to introduce interaction plots obtained via measurements of the major hysteresis loop and a recoil curve only. The method is effectively tested on three real magnetic systems which evidence different interaction effects. Although the plots introduced here seem to provide information about interactions alike the classical remanence plots, they present important advantages. These plots are acquired in an easier and faster manner and do not demand demagnetization, which significantly simplifies the measurement procedure and allows assessment of interaction effects in virtually impossible to demagnetize systems with rectangular major loops. Furthermore, this method can easily be adapted for estimation of effects leading to deviations from theoretical behavior of other hysteretic quantities.