The dynamic chirality flips of Skyrmion bubbles

TL;DR

This study reconstructs the three-dimensional magnetic structure of skyrmion bubbles in Mn-Ni-Ga, revealing their ability to switch chirality while maintaining polarity, providing insights into their dynamic behavior.

Contribution

It introduces a vector field tomography method to analyze 3D spin textures and uncovers the chirality switching mechanism of skyrmion bubbles in centrosymmetric materials.

Findings

Skyrmion bubbles can switch chirality easily.

Chirality switching occurs without changing polarity.

The study provides insights into skyrmion dynamics in 3D.

Abstract

Magnetic skyrmion, a topological magnetic domain with complex non-coplanar spin texture, appears a disk-like structure in two dimensions. Exploring three-dimensional spin texture and related chirality switching has drawn enormous interests from the perspective of fundamental research. Here, the three-dimensional magnetic moment of the skyrmion bubbles in centrosymmetric Mn-Ni-Ga were reconstructed with the vector field tomography approach via Lorentz transmission electron microscopy. The type of the bubbles was determined from investigating the magnetic vectors in entire space. We found that the bubbles switched their chirality easily but still keep the polarity to remain the singularity of the bubbles within the material. Our results offer valuable insights into the fundamental mechanisms underlying the spin chirality flips dynamics of skyrmion bubbles.