| Autor: |
Esposito, V., Zheng, X. Y., Seaberg, M. H., Montoya, S. A., Holladay, B., Reid, A. H., Streubel, R., Lee, J. C. T., Shen, L., Koralek, J. D., Coslovich, G., Walter, P., Zohar, S., Thampy, V., Lin, M. F., Hart, P., Nakahara, K., Fischer, P., Colocho, W., Lutman, A. |
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| Zdroj: |
Applied Physics Letters; 5/4/2020, Vol. 116 Issue 18, p1-5, 5p, 1 Color Photograph, 2 Graphs |
| Abstrakt: |
Magnetic skyrmions are topologically protected spin textures with promising prospects for applications in data storage. They can form a lattice state due to competing magnetic interactions and are commonly found in a small region of the temperature—magnetic field phase diagram. Recent work has demonstrated that these magnetic quasi-particles fluctuate at the μeV energy scale. Here, we use a coherent x-ray correlation method at an x-ray free-electron laser to investigate these fluctuations in a magnetic phase coexistence region near a first-order transition boundary where fluctuations are not expected to play a major role. Surprisingly, we find that the relaxation of the intermediate scattering function at this transition differs significantly compared to that deep in the skyrmion lattice phase. The observation of a compressed exponential behavior suggests solid-like dynamics, often associated with jamming. We assign this behavior to disorder and the phase coexistence observed in a narrow field-window near the transition, which can cause fluctuations that lead to glassy behavior. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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