6533b839fe1ef96bd12a6692
RESEARCH PRODUCT
Time-resolved imaging of pulse-induced magnetization reversal with a microwave assist field
Markus WeigandJan RhensiusCharanjit S. BhatiaMathias KläuiSiddharth RaoHyunsoo YangMohamad-assaad MawassMohamad-assaad MawassAndré BisigAndré Bisigsubject
Condensed Matter - Materials ScienceMultidisciplinaryMaterials scienceCondensed matter physicsField (physics)Relaxation (NMR)Materials Science (cond-mat.mtrl-sci)FOS: Physical sciencesBioinformaticsequipment and suppliesArticlePulse (physics)MagnetizationDomain wall (magnetism)Spin wavehuman activitiesMicrowaveSpin-½description
AbstractThe 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-05-01 | Scientific Reports |