Field-controlled domain wall pinning-depinning effects in ferromagnetic nanowire-nanoparticles system

TL;DR

This paper investigates how domain walls in ferromagnetic nanowires can be controlled via nanoparticle configurations, enabling potential applications in magnetic logic devices through micromagnetic modeling and experiments.

Contribution

It introduces a novel NW-NPs configuration that allows controlled DW pinning-depinning and proposes an algorithm for external field manipulation for magnetic logic.

Findings

Demonstrated controlled DW pinning-depinning using NW-NPs configuration

Developed an algorithm for external field manipulation and NPs switching

Proposed a new type of magnetic logic cell based on this system

Abstract

We represent the results of micromagnetic modeling and experimental magnetic force microscopy investigations of domain wall (DW) pinning-depinning effects in the hybrid systems consisting of ferromagnetic nanowire (NW) and two ferromagnetic nanoparticles (NPs). It was demonstrated that the special NW-NPs configuration including the NW with DW nucleating bulb at one end and two-NP gate enables the realization of controlled DW pinning-depinning based on switching of magnetization in NPs subsystem. The algorithm of external driving field manipulation and independent NPs switching, which allow one to develop a new type of magnetic logic cells, is proposed.