Curvature of nanomagnets can be used to induce chiral textures in the magnetization field. Here we perform analytical calculations and micromagnetic simulations aiming to analyze the stability of in-surface magnetization configurations in toroidal nanomagnets. We have obtained that despite toroidal vortex-like configurations are highly stable in magnetic nanotori, the interplay between geometry and magnetic properties promotes the competition between effective interactions yielding the development of a core in a vortex state when the aspect ratio between internal and external radii of nanoturus is ≳0.75.
@article{arxiv.1812.03729,
title = {Analysis on the stability of in-surface magnetic configurations in toroidal nanoshells},
author = {A. W. Teixeira and S. Castillo-Sepúlveda and S. Vojkovic and J. M. Fonseca and D. Altbir and Á. S. Núñez and V. L. Carvalho-Santos},
journal= {arXiv preprint arXiv:1812.03729},
year = {2019}
}