Irreversible susceptibility of initial magnetization curve

TL;DR

This paper introduces a universal method to estimate reversible and irreversible susceptibilities from initial magnetization curves, applicable to various materials, and validated against a theoretical model with excellent agreement.

Contribution

A new method for estimating susceptibilities from initial magnetization curves that does not depend on the specific magnetic anisotropy or processes involved.

Findings

Method aligns well with the remanence curve approach for theoretical models.

Applicable to a wide range of real magnetic materials.

Provides a practical way to analyze magnetization energy.

Abstract

A method for estimation of reversible and irreversible susceptibilities of initial magnetization curves has been developed. It deals only with the energy necessary for magnetizing and demagnetizing the sample, not with the nature of the magnetization processes neither with a specific type of anisotropy, so it could be applied for a wide variety of real materials. A set of minor hysteresis loops of an initially demagnetized sample, plotted with progressively increasing maximum magnetic field, has been used. The obtained results showed an excellent coincidence with those calculated by the remanence curve method for a Stoner-Wohlfarth model system.