Effect of Demagnetization Method on Remnance Magnetization States in Metallic Ferromagnets

TL;DR

This paper investigates how different demagnetization methods affect the remanent magnetization states in metallic ferromagnets, comparing experimental Henkel plots with theoretical models to understand domain wall motion effects.

Contribution

It introduces a comparative analysis of Henkel plots for various metallic ferromagnets and evaluates their consistency with existing magnetic models, highlighting the role of domain wall motion.

Findings

Henkel plots show similarities to Monte Carlo simulations.

Differences explained by domain wall motion effects.

Remagnetization behavior varies with demagnetization paths.

Abstract

Parametric plots of the remagnetization versus demagnetization remnances were found for four metallic ferromagnets -- nickel wire, two types of AlNiCo, and samarium cobalt 2:17. These plots, known as Henkel plots, were compared to Wohlfarth's model for noninteracting magnetic particles and several Preisach models. The remagnetization data were taken with a variety of paths to the net zero magnetization state. The resulting Henkel plots exhibit similarities to independent Monte Carlo simulations. The differences can be mostly explained by considering that the magnetization in the metallic ferromagnets occur by domain wall motion.