From Bubble to Skyrmion: Dynamic Transformation Mediated by a Strong Magnetic Tip

TL;DR

This paper demonstrates how a magnetic tip can induce a transition from a magnetic bubble to a stable Skyrmion in thin ferromagnetic films through analytical and numerical methods.

Contribution

It introduces a model mimicking RKKY interactions and shows the dynamic transformation process from bubble to Skyrmion.

Findings

Bubble transforms into Skyrmion under magnetic tip influence

Analytical and numerical evidence supports the transformation process

Modeling of RKKY-like interactions in thin films

Abstract

Skyrmions in thin metallic ferromagnetic films are stable due to competition between the RKKY interaction and uniaxial magnetic anisotropy. We mimic the RKKY interaction by the next-nearest-neighbors ferromagnetic and antiferromagnetic exchange interactions. We demonstrate analytically and numerically dissipative transformation of a bubble created by a strong cylindrical magnetic tip into a stable Skyrmion.