Current-induced domain wall oscillations in a nanowire imaged by time-resolved 
photoemission electron microscopy

Khan, M. Imtiaz; Cramm, Stefan; Bürgler, Daniel E.; Parlak, Umut; Nemsák, Slavomir; Gottlob, Daniel M.; Hackl, Johanna; Doganay, Hatice; Schneider, Claus M.

doi:10.1016/j.jmmm.2019.01.003

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Current-induced domain wall oscillations in a nanowire imaged by time-resolved photoemission electron microscopy

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Gottlob, Daniel M.
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Khan, M. I., Cramm, S., Bürgler, D. E., Parlak, U., Nemsák, S., Gottlob, D. M., et al. (2019). Current-induced domain wall oscillations in a nanowire imaged by time-resolved photoemission electron microscopy. Journal of Magnetism and Magnetic Materials, 476, 538-545. doi:10.1016/j.jmmm.2019.01.003.

Cite as: https://hdl.handle.net/21.11116/0000-0002-D356-F

Abstract

We study reversible domain wall motion in half-ring Ni₈₀Fe₂₀ nanowires on a nanosecond (ns) timescale in a truly current-induced pump-probe experiment using an energy filtered, aberration-corrected photoemission electron microscope. The X-ray magnetic circular dichroism signal is probed at different time delays before, during and after the current pulse in a stroboscopic mode with circularly polarized synchrotron radiation in the energy range of the Fe L₃-edge (707 eV). We observe lateral domain wall oscillations with a frequency of 0.4 GHz. Comparing the results to a proposed string model, we find that the domain wall oscillations can be described as string-like asymmetric oscillations.