Current-induced vortex dynamics and pinning potentials probed by homodyne detection
| Type of Publication: | Journal article |
| URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-125768 |
| Author: | Kim, June-Seo; Boulle, Olivier; Verstoep, Steven; Heyne, Lutz; Rhensius, Jan; Kläui, Mathias; Heyderman, Laura Jane; Kronast, Florian; Mattheis, Roland; Ulysse, Christian; Faini, Giancarlo |
| Year of publication: | 2010 |
| Published in: | Physical Review B ; 82 (2010). - 104427 |
| DOI (citable link): | https://dx.doi.org/10.1103/PhysRevB.82.104427 |
| Summary: |
Using a homodyne detection scheme, we show that we can determine the polarity and chirality of a magnetic vortex in an asymmetric magnetic disk as well as the resonance frequency and phase shift of the dynamic vortex gyration excited by a spin-polarized current. From systematic phase measurements, we deduce the relative contributions of the spin torque and the Oersted field, which is found to dominate the excitation. Local pinning sites in the disk lead to an increased resonance frequency and a reduced amplitude. This allows us to draw a map of the pinning sites and thus to characterize the full potential in the disk.
|
| Subject (DDC): | 530 Physics |
| Link to License: | In Copyright |
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KIM, June-Seo, Olivier BOULLE, Steven VERSTOEP, Lutz HEYNE, Jan RHENSIUS, Mathias KLÄUI, Laura Jane HEYDERMAN, Florian KRONAST, Roland MATTHEIS, Christian ULYSSE, Giancarlo FAINI, 2010. Current-induced vortex dynamics and pinning potentials probed by homodyne detection. In: Physical Review B. 82, 104427. Available under: doi: 10.1103/PhysRevB.82.104427
@article{Kim2010Curre-8971, title={Current-induced vortex dynamics and pinning potentials probed by homodyne detection}, year={2010}, doi={10.1103/PhysRevB.82.104427}, volume={82}, journal={Physical Review B}, author={Kim, June-Seo and Boulle, Olivier and Verstoep, Steven and Heyne, Lutz and Rhensius, Jan and Kläui, Mathias and Heyderman, Laura Jane and Kronast, Florian and Mattheis, Roland and Ulysse, Christian and Faini, Giancarlo}, note={Article Number: 104427} }
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