Topological magnetic charge Q is a fundamental parameter that describes the magnetic domains and determines their intriguing electromagnetic properties. The ability to switch Q in a controlled way by electrical methods allows for flexible manipulation of electromagnetic behavior in future spintronic devices. Here we report the room-temperature current-controlled topological magnetic transformations between Q = -1 skyrmions and Q = 0 stripes or type-II bubbles in a kagome crystal Fe3Sn2. We show that the reproducible and reversible skyrmion-bubble and skyrmion-stripe transformations can be achieved by tuning the density of nanosecond pulsed current of the order of ~1010 A−2. Further numerical simulations suggest that spin-transfer torque combined with Joule thermal heating effects determine the current-induced topological magnetic transformations.
@article{arxiv.2205.12426,
title = {Current-Controlled Topological Magnetic Transformations in a Nanostructured Kagome Magnet},
author = {Wensen Wei and Jin Tang and Yaodong Wu and Yihao Wang and Jialiang Jiang and Junbo Li and Y. Soh and Yimin Xiong and Mingliang Tian and Haifeng Du},
journal= {arXiv preprint arXiv:2205.12426},
year = {2022}
}