Domain-specific magnetization reversals on a permalloy square ring array

TL;DR

This paper investigates how different magnetic domains in a permalloy square ring array reverse their magnetization, revealing domain-specific behaviors and the coexistence of vortex and onion states through experimental and simulation methods.

Contribution

It introduces a method to extract domain-specific hysteresis loops and demonstrates the coexistence of vortex and onion states in permalloy square rings.

Findings

Pinned domain magnetization remains fixed during reversal.

Other domains rotate continuously, indicating different reversal mechanisms.

Experimental results align with micromagnetic simulations.

Abstract

We present domain-specific magnetization reversals extracted from soft x-ray resonant magnetic scattering measurement on a permalloy square ring array. The extracted domain-specific hysteresis loops reveal that the magnetization of the domain parallel to the field is strongly pinned, while those of other domains rotate continuously. In comparison with the micromagnetic simulation, the hysteresis loop on the pinned domain indicates a possibility of the coexistence of the square rings with the vortex and onion states.