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arXiv · 2611.00858

High-order concentric hopfions in a helimagnet

Konstantin L. Metlov·Maksim M. Gordei
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Abstract

Magnetic hopfions are three-dimensional topological solitons: ``knots'' in the vector field of magnetization of magnetically ordered materials, which are a key element of the three-dimensional spintronics emerging today. In this work, a simple analytical model for a new type of magnetic hopfions --- ``concentric'' ones --- is constructed and solved. Their size and equilibrium energy are estimated, their stability region on the magnetic phase diagram of a helimagnet is mapped out, and the requirements for materials admitting equilibrium concentric hopfions with high Hopf index on a uniformly magnetized background are determined.

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Konstantin L. Metlov, Maksim M. Gordei. 2026-10-31. High-order concentric hopfions in a helimagnet. https://arxiv.org/abs/2611.00858

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