Hard magnet coercivity

TL;DR

This paper critically analyzes coercive properties of RFeB magnets, identifying common reversal features and providing a model that links defect characteristics to coercivity, enhancing understanding of magnet reversal mechanisms.

Contribution

It offers a comprehensive analysis of experimental coercivity data and introduces a model connecting defect properties to reversal mechanisms in RFeB magnets.

Findings

Common features of reversal processes identified

Model provides quantitative description of coercivity

Links between defect properties and reversal mechanisms established

Abstract

Based on a critical analysis of the experimental coercive properties, general considerations on the reversal mechanisms in RFeB magnets are recalled. By plotting together the experimental parameters obtained in various magnets, common features of the reversal processes are demonstrated. Modeling provides an almost quantitative description of coercivity in these materials and permits connecting the defect characteristic properties to reversal mechanisms.