Geometry-induced frustration of magnetization in a planar soft-hard magnetic system

TL;DR

This paper investigates how geometric constraints and magnetic properties induce frustration in a soft-hard magnetic system, leading to complex energy landscapes and hysteresis, with potential applications in controlling magnetic nanoparticles.

Contribution

It introduces a computational study of geometry-induced magnetic frustration in a soft-hard magnetic system and explores its implications for magnetic nanoparticle manipulation.

Findings

Frustrated magnetic configurations depend on geometry and external fields.

Energy landscape exhibits strong undulations influenced by soft magnet properties.

Potential application in local control of magnetic nanoparticle movement.

Abstract

We computationally study the frustrated magnetic configurations of a thin soft magnetic layer with the boundary condition fixed by underlying hard magnets. Driven by geometrical constraints and external magnetic field, transitions between frustrated energy minima result in magnetic hysteretic behavior. The presence of soft-magnet introduces strong undulations in the energy landscape in a length scale set by the magnetic property of the soft magnet. We propose a possible use of the phenomena to locally control the movement of magnetic nanoparticles.