2026-01-15 中国科学院（CAS）
＜関連情報＞
- https://english.cas.cn/newsroom/research_news/phys/202602/t20260210_1150648.shtml
- https://www.nature.com/articles/s41563-025-02450-0
カイラル磁性体への磁気ヘリクノトンの電気的書き込み Electrically writing a magnetic heliknoton in a chiral magnet
Long Li,Dongsheng Song,Weiwei Wang,Lingyao Kong,Shuisen Zhang,Ning Wang,Shilei Zhang,Mingliang Tian,Jiadong Zang,Yizhou Liu & Haifeng Du
Nature Materials Published:07 January 2026
DOI:https://doi.org/10.1038/s41563-025-02450-0
Abstract
A magnetic heliknoton is the three-dimensional counterpart to the two-dimensional magnetic skyrmion, and serves as a pivotal topological soliton for extending topological magnetism into three dimensions. However, its experimental realization remains elusive. Here we report the controlled nucleation of a magnetic heliknoton in the chiral magnet FeGe at zero magnetic field, achieved through nanoscale current-pulse excitation. By combining angle-dependent quantitative electron holography with micromagnetic simulations, we resolve the three-dimensional spin texture of the heliknoton. In particular, the heliknoton exhibits current-driven collinear motion without the Hall effect. Our findings establish a readily accessible experimental platform for further exploration of three-dimensional topological solitons and highlight their potential for practical applications.
