Journal
NANO LETTERS
Volume 19, Issue 1, Pages 375-380Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b04091
Keywords
current-induced domain wall motion; field-induced domain wall motion; magnetization dynamics; time-resolved X-ray microscopy
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Funding
- European Community [290605]
- European Union [665095]
- Swiss National Science Foundation [200021_172517]
- Russian Science Foundation [18-79-00198]
- Russian Science Foundation [18-79-00198] Funding Source: Russian Science Foundation
- Swiss National Science Foundation (SNF) [200021_172517] Funding Source: Swiss National Science Foundation (SNF)
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We report on the time-resolved investigation of current- and field-induced domain wall motion in the flow regime in perpendicularly magnetized microwires exhibiting antisymmetric exchange interaction by means of scanning transmission X-ray microscopy with a 200 ps time step. The sub-ns time step of the dynamical images allowed us to observe the absence of incubation times for the motion of the domain wall within an uncertainty of 200 ps, together with indications for a negligible inertia of the domain wall. Furthermore, we observed that, for short current and magnetic field pulses, the magnetic domain walls do not exhibit a tilting during their motion, providing a mechanism for the fast, tilt-free, current-induced motion of magnetic domain walls.
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