Simulated hysteresis loop of a bent Fe-rich glass-covered wire

TL;DR

This paper uses micromagnetic simulations to analyze how the shape of a Fe-rich glass-covered wire influences its internal stress distribution and hysteresis behavior, revealing surface bistability dependent on inner core interactions.

Contribution

It introduces a new simulation approach that accounts for shape-dependent stress distribution and local anisotropy in Fe-rich glass-covered wires.

Findings

Surface hysteresis loops show bistability influenced by neighboring inner core regions.

The wire shape significantly affects the internal stress distribution and magnetic response.

Simulations highlight the importance of local stress in determining magnetic hysteresis.

Abstract

We present new micromagnetic simulations, where an influence of the wire shape on the spatial distribution of internal magnetoelastic stress is taken into account. Local magnetoelastic anisotropy is approximated to be uniaxial, with spatial dependence due to the stress distribution. The hysteresis loop is calculated with the $mumax^3$ software for the wire volume and separately for selected parts of the wire, including the surface. The bistability of the calculated surface hysteresis loops depends on the behaviour of the neighboring part of the inner core, most close to the surface element where the surface loop is measured.