Mutual conversion between a magnetic Neel hopfion and a Neel toron
Abstract
Three-dimensional (3D) magnetic textures attract great attention from researchers due to their fascinating structures and dynamic behaviors. Magnetic hopfion is a prominent example of 3D magnetic textures. Here, we numerically study the mutual conversion between a Neel-type hopfion and a Neel-type toron under an external magnetic field. We also investigate the excitation modes of hopfions and torons in a film with strong perpendicular magnetic anisotropy. It is found that the Neel-type hopfion could be a stable state in the absence of the external magnetic field, and its diameter varies with the out-of-plane magnetic field. The Neel-type hopfion may transform to a Neel-type toron at an out-of-plane magnetic field of about 20 mT, where the cross section structure is a Neel-type skyrmion. The hopfion and toron show different excitation modes in the presence of an in-plane microwave magnetic field. Our results provide a method to realize the conversion between a Neel-type hopfion and a Neel-type toron, which also gives a way to distinguish Bloch-type and Neel-type hopfions.
Keywords
Cite
@article{arxiv.2202.05622,
title = {Mutual conversion between a magnetic Neel hopfion and a Neel toron},
author = {Shuang Li and Jing Xia and Laichuan Shen and Xichao Zhang and Motohiko Ezawa and Yan Zhou},
journal= {arXiv preprint arXiv:2202.05622},
year = {2022}
}
Comments
Originally submitted to PRB on 23 December 2021