Time-resolved imaging of pulse-induced magnetization reversal with a microwave assist field
| Autor: | Markus Weigand, Jan Rhensius, Charanjit S. Bhatia, Mathias Kläui, Siddharth Rao, Hyunsoo Yang, Mohamad-Assaad Mawass, André Bisig |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Condensed Matter - Materials Science
Multidisciplinary Materials science Condensed matter physics Field (physics) Relaxation (NMR) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Bioinformatics equipment and supplies Article Pulse (physics) Magnetization Domain wall (magnetism) Spin wave human activities Microwave Spin-½ |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | The reversal of the magnetization under the influence of a field pulse has been previously predicted to be an incoherent process with several competing phenomena such as domain wall relaxation, spin wave-mediated instability regions and vortex-core mediated reversal dynamics. However, there has been no study on the direct observation of the switching process with the aid of a microwave signal input. We report a time-resolved imaging study of magnetization reversal in patterned magnetic structures under the influence of a field pulse with microwave assistance. The microwave frequency is varied to demonstrate the effect of resonant microwave-assisted switching. We observe that the switching process is dominated by spin wave dynamics generated as a result of magnetic instabilities in the structures and identify the frequencies that are most dominant in magnetization reversal. |
| Databáze: | OpenAIRE |
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