Electrode Design for Antiparallel Magnetization Alignment in Nanogap Devices

TL;DR

This paper investigates how electrode shape and field orientation affect magnetization reversal in nanogap devices, identifying optimal geometries for controllable parallel and anti-parallel magnetization states.

Contribution

It introduces a specific electrode design and setup that enables reliable switching between magnetization alignments in nanogap spintronic devices.

Findings

Optimal device geometry for planar, monodomain electrodes identified

Magnetization switching between parallel and anti-parallel states demonstrated

Micromagnetic simulations validate the proposed design approach

Abstract

The ability to manipulate the relative magnetization alignment between ferromagnetic source and drain electrodes attached to a molecule or small quantum dot is a prerequisite for a number of spintronic device applications. The influence of electrode shape and field orientation on pair-wise magnetization reversal mechanisms in nanogap and point-contact structures is investigated here using micromagnetic simulations. A favorable device geometry and setup are identified for enabling planar, monodomain source and drain electrodes with a magnetization alignment that may be controllably switched between a parallel and anti-parallel configuration.