First experimental evidence of hopfions in crystals: Research opens up new dimension for future technology

https://phys.org/news/2023-11-experimental-evidence-hopfions-crystals-dimension.html

"Skyrmions are 2D, while hopfions are 3D structures within magnetic sample volume resembling closed, twisted skyrmion strings in donut-shaped ring in simplest case.... stabilized in B20-type FeGe plate crystal using transmission electron microscopy and holography... topological solitons in 3D chiral magnets... compared to skyrmions, hopfions have an additional degree of freedom since 3D... racetrack memory, neuromorphic computing, and qubits"