Modeling High-Order Ferromagnetic Hysteretic Minor Loops and Spirals Using a Generalized Positive-Feedback Theory

A generalization of the previously-described positive-feedback theory of first- and second-order reversal curves permits modeling of minor loops of arbitrarily high order n. The validity of the theory is tested by using it to model various types of high-order phenomena (n ≥3), including symmetrical and asymmetrical spirals as well as closed minor loops, in a variety of different hard and soft ferromagnetic materials that exhibit the return-point memory property.