Magnetic Antivortices

Pues, M.; Meier, G.

doi:10.1007/978-3-319-99558-8_15

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Magnetic Antivortices

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Meier, G.
Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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https://dx.doi.org/10.1007/978-3-319-99558-8_15
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Citation

Pues, M., & Meier, G. (2018). Magnetic Antivortices. In R. Wiesendanger (Ed.), Atomic- and Nanoscale Magnetism (1st Ed., pp. 299-323). Basel: Springer Nature Switzerland AG. doi:10.1007/978-3-319-99558-8_15.

Cite as: https://hdl.handle.net/21.11116/0000-0002-7FFF-2

Abstract

We investigate the dynamics of magnetic antivortices by time-resolved magnetic X-ray microscopy and high-frequency absorption spectroscopy. A method for the reliable generation of isolated magnetic antivortices is devised using specifically formed microstructures and two-dimensional sequences of magnetic fields. For antivortices the measured resonance frequency is lower than for comparable vortices. The deflection of antivortices by external fields reveals strong deviations from a harmonic potential as well as rather low annihilation fields. Spectroscopy yields a characteristic absorption signal for antivortices for strong excitation that indicates a continuous switching of the antivortex core.