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Embedded skyrmion bags in thin films of chiral magnets
- Source :
- Advanced Materials 2024, 2403274
- Publication Year :
- 2024
-
Abstract
- Magnetic skyrmions are topologically nontrivial spin configurations that possess particle-like properties. Earlier research was mainly focused on a specific type of skyrmion with topological charge Q = -1. However, theoretical analyses of two-dimensional chiral magnets have predicted the existence of skyrmion bags -- solitons with arbitrary positive or negative topological charge. Although such spin textures are metastable states, recent experimental observations have confirmed the stability of isolated skyrmion bags in a limited range of applied magnetic fields. Here, by utilizing Lorentz transmission electron microscopy, we show the extraordinary stability of skyrmion bags in thin plates of B20-type FeGe. In particular, we show that skyrmion bags embedded within a skyrmion lattice remain stable even in zero or inverted external magnetic fields. A robust protocol for nucleating such embedded skyrmion bags is provided. Our results agree perfectly with micromagnetic simulations and establish thin plates of cubic chiral magnets as a powerful platform for exploring a broad spectrum of topological magnetic solitons.<br />Comment: 17 pages, 15 figures
Details
- Database :
- arXiv
- Journal :
- Advanced Materials 2024, 2403274
- Publication Type :
- Report
- Accession number :
- edsarx.2403.16931
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1002/adma.202403274