Fingerprinting Hysteresis

TL;DR

This paper evaluates the effectiveness of FORC diagrams in predicting magnetic hysteresis by comparing them with switching-field histograms from simulations, revealing qualitative agreement but notable differences especially in frustrated systems.

Contribution

It introduces a comparison method between FORC diagrams and microscopic switching-field histograms, highlighting their similarities and differences in simulated magnetic systems.

Findings

Qualitative agreement between FORC diagrams and switching-field histograms

Differences are more pronounced in frustrated magnetic systems

Discussion of potential sources for discrepancies

Abstract

We test the predictive power of first-oder reversal curve (FORC) diagrams using simulations of random magnets. In particular, we compute a histogram of the switching fields of the underlying microscopic switching units along the major hysteresis loop, and compare to the corresponding FORC diagram. We find qualitative agreement between the switching-field histogram and the FORC diagram, yet differences are noticeable. We discuss possible sources for these differences and present results for frustrated systems where the discrepancies are more pronounced.