Abstract
A Preisach hysteresis model for the case in which Everett's function, E(H/sub 1/, H/sub 2/), has been defined from measurements of the magnetization change from a turning point H/sub 1/ to the field H/sub 2/. E(H/sub 1/, H/sub 2/) is the integral of the Preisach density function, whose symmetry imposes the relation E(H/sub 1/, H/sub 2/)=E(-H/sub 1/, -H/sub 2/). This is inconsistent with measured first-order curves. The source of the inconsistency is that magnetization changes depend on the state of the medium, not just the most recent turning point as Preisach assumes. A Preisach-like algorithm is proposed that is consistently defined by first-order curves and that predicts magnetization changes based on the state of the medium. The algorithm maintains a turning-point history and predicts closed minor loops, like the traditional model, but also predicts noncongruent minor loops and nonzero initial susceptibility. >
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