Dynamic Imaging of the Delay-and Tilt-Free Motion of Neel Domain Walls in Perpendicularly Magnetized Superlattices
Dynamic Imaging of the Delay-and Tilt-Free Motion of Neel Domain Walls in Perpendicularly Magnetized Superlattices
Finizio, S.; Wintz, S.; Zeissler, K.; Sadovnikov, A. V.; Mayr, S.; Nikitov, S. A.; Marrows, C. H.; Raabe, J.
Abstract
We report on the time-resolved investigation of current- and field-induced domain wall motion in perpendicularly magnetized microwires exhibiting asymmetric exchange interaction by means of scanning transmission x-ray microscopy using a time step of 200 ps. Dynamical domain wall velocities on the order of 50-100 m s−1 were observed. The improvement in the temporal resolution allowed us to observe the absence of incubation times for the motion of the domain wall, together with indications for a negligible inertia. Furthermore, we observed that, for short current and magnetic field pulses, the magnetic domain walls do not exhibit a tilting during its motion, providing a mechanism for the fast, tilt-free, motion of magnetic domain walls.
Keywords: domain wall motion; x-ray microscopy; spin-orbit torques
Involved research facilities
- Ion Beam Center DOI: 10.17815/jlsrf-3-159
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- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 28022) publication
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Nano Letters 19(2019), 375
Online First (2018) DOI: 10.1021/acs.nanolett.8b04091
Cited 13 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-28022