Marijan Beg1,2, Ryan A. Pepper2, David Cortés-Ortuño2, Bilal Atie2, Marc-Antonio Bisotti2, Gary Downing2, Thomas Kluyver2, Ondrej Hovorka2, and Hans Fangohr1,2
1 European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
2 Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, United Kingdom
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The prediction of magnetic skyrmions being used to change the way we store and process data has led to materials with Dzyaloshinskii-Moriya interaction coming into the focus of intensive research. So far, studies have looked mostly at magnetic systems composed of materials with single chirality. In a search for potential future spintronic devices, combination of materials with different chirality into a single system may represent an important new avenue for research. Using finite element micromagnetic simulations, we study an FeGe disk with two layers of different chirality. We show that for particular thicknesses of layers, a stable Bloch point emerges at the interface between two layers. In addition, we demonstrate that the system undergoes hysteretic behaviour and that two different types of Bloch point exist. These ‘head-to-head’ and ‘tail-to-tail’ Bloch point configurations can, with the application of an external magnetic field, be switched between. Finally, by investigating the time evolution of the magnetisation field, we reveal the creation mechanism of the Bloch point. Our results introduce a stable and manipulable Bloch point to the collection of particle-like state candidates for the development of future spintronic devices.
This repository provides Ubermag simulation code necessary to reproduce results from Beg et al. Stable and manipulable Bloch point. Scientific Reports, 9, 7959 (2019).
Jupyter notebooks hosted in this repository can be executed and modified in the cloud via Binder. This does not require you to have anything installed and no files will be created on your machine. To access Binder, use this link.
If you require support or have any questions, you are welcome to raise an issue in our ubermag/help repository.
Licensed under the BSD 3-Clause "New" or "Revised" License. For details, please refer to the LICENSE file.
Please cite the corresponding paper as:
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M. Beg et al. Stable and manipulable Bloch point. Scientific Reports 9, 7959 (2019).
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M. Beg, et al. GitHub repository: Stable and manipulable Bloch point. (Version 1.0.0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.2938933 (2019).
Developed as a part of OpenDreamKit – Horizon 2020 European Research Infrastructure project (676541). Add another grants here if necessary.