Kinetics of Magnetic Skyrmion Crystal Formation from the Conical Phase
| Autor: | Lin Zhou, Haijun Zhao, Brandt Jensen, Phuong-Vu Ong, Liqin Ke, Baozhi Cui, Tae-Hoon Kim, Alexander H. King |
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| Rok vydání: | 2021 |
| Předmět: |
Arrhenius equation
Physics Condensed matter physics Mechanical Engineering Skyrmion Nucleation Bioengineering 02 engineering and technology General Chemistry Magnetic skyrmion 021001 nanoscience & nanotechnology Condensed Matter Physics Magnetic field symbols.namesake Avrami equation symbols Quasiparticle General Materials Science 0210 nano-technology Spin-½ |
| Zdroj: | Nano Letters. 21:5547-5554 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c00923 |
| Popis: | The particle-like magnetic skyrmion or skyrmion lattice (SkX) formation has promoted strong application and fundamental science interests. Despite extensive research, the kinetic of the SkX development is much less understood because of the ultrafast spin rotation and high sensitivity to external perturbations. Here, using in situ Lorentz transmission electron microscopy, we successfully measured the dynamics of SkX formation from the conical phase with precise control of both the temperature and the magnetic field. We discovered that the Avrami equation can accurately describe the transition process with an initial Avrami constant around 1, suggesting that the rate-limiting step for the quasiparticle lattice formation is one-dimensional heterogeneous nucleation of individual skyrmions. A modified Arrhenius rate law is established, with an energy barrier that has a square-root dependence on temperature and a quadratic dependence on the magnetic field. This study paves the way toward precise and predictable manipulation of topological spin structures. |
| Databáze: | OpenAIRE |
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