Work

Controlled nucleation of hopfions with field pulses

Year: 2026

Type: article

Abstract: We demonstrate a mechanism for the deterministic nucleation of magnetic hopfions in cylindrical nanopillars via transient magnetic field pulses. By exploiting a chiral magnetic cylinder with engineered surface uniaxial anisotropy, we show that field pulses trigger a non-equilibrium magnetization dynamics. Depending on the pulse amplitude, the system relaxes into distinct topologically protected energy minima, stabilizing either isolated hopfions or coexisting states with other three-dimensional solitons. This approach offers a framework for manipulating 3D topological textures without requiring localized spin-polarized currents, broadening the understanding of three-dimensional nanomagnetism.

Source: Scientific Reports

DOI: 10.1038/s41598-026-75777-6

Authors: S. Castillo-Sepulveda, G. Saéz, R. M. Corona, D. Altbir, V. L. Carvalho-Santos

Institutions: Universidad Autónoma de Chile, Forschungszentrum Jülich, Metropolitan University of Technology, Universidad Diego Portales, Universidade Federal de Viçosa

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

OpenAlex ID: W7222797220

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