Ferroelectrics Manipulate Magnetic Bloch Skyrmions in a Composite Bilayer

TL;DR

This paper proposes a micromagnetic model demonstrating how ferroelectric polarization can control magnetic Bloch Skyrmions in a chiral-magnetic/ferroelectric bilayer, highlighting the effects of various parameters on Skyrmion behavior.

Contribution

It introduces a new micromagnetic model for manipulating magnetic Skyrmions via ferroelectric polarization in a composite bilayer system.

Findings

Skyrmion properties depend on propagation velocity

System size influences Skyrmion stability

Magnetoelectric coupling strength affects Skyrmion formation

Abstract

Theoretical investigation demonstrates that the composite bilayer (i.e., chiral-magnetic/ferroelectric bilayer) offers the possibility of electric-induced magnetic Skyrmions [Phys. Rev. B \textbf{94}, 014311 (2016)]. In this Article, we propose a micromagnetic model to physically manipulate magnetic Bloch Skyrmions propagating in a chiral-magnetic thin film with a polarized ferroelectric essential to drive the system through the converse magnetoelectric effect. Effects caused by different velocities of the propagation, sizes of the thin film, and strength of the magnetoelectric couplings strongly impact on quality and quantity of the magnetic Skyrmions.