Thermal Stability of Skyrmion Tubes in Nanostructured Cuboids
arXiv:2502.10651 · doi:10.1021/acs.nanolett.3c04181
Abstract
Magnetic skyrmions in bulk materials are typically regarded as two-dimensional structures. However, they also exhibit three-dimensional configurations, known as skyrmion tubes, which elongate and extend in-depth. Understanding the configurations and stabilization mechanism of skyrmion tubes is crucial for the development of advanced spintronic devices. However, the generation and annihilation of skyrmion tubes in confined geometries are still rarely reported. Here, we present direct imaging of skyrmion tubes in nanostructured cuboids of a chiral magnet FeGe using Lorentz transmission electronic microscopy (TEM), while applying an in-plane magnetic field. It is observed that skyrmion tubes stabilize in a narrow field-temperature region near the Curie temperature (Tc). Through a field cooling process, metastable skyrmion tubes can exist in a larger region of the field-temperature diagram. Combining these experimental findings with micromagnetic simulations, we attribute these phenomena to energy differences and thermal fluctuations. Our results could promote topological spintronic devices based on skyrmion tubes.
Published in Nano Lett. 2024, 24, 5, 1587-1593
References in corpus (8)
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Magnetic Skyrmion Bundles and Their Current-Driven Dynamics
- Three-dimensional skyrmion states in thin films of cubic helimagnets
- Electrical Probing of Field-Driven Cascading Quantized Transitions of Skyrmion Cluster States in MnSi Nanowires
- Metallic State in Cubic FeGe beyond its Quantum Phase Transition
- Field-Driven Evolution of Chiral Spin Textures in Thin Nanodisk of the Helimagnets
- Two-dimensional characterization of three-dimensional magnetic bubbles in FeSn nanostructures
- Current-induced viscoelastic topological unwinding of metastable skyrmion strings