Abstract
We study current-induced domain-wall motion in a narrow ferromagnetic wire. We propose a way to move domain walls with a resonant time-dependent current which dramatically decreases the Ohmic losses in the wire and allows driving of the domain wall with higher speed without burning the wire. For any domain-wall velocity we find the time dependence of the current needed to minimize the Ohmic losses. Below a critical domain-wall velocity specified by the parameters of the wire the minimal Ohmic losses are achieved by dc current. Furthermore, we identify the wire parameters for which the losses reduction from its dc value is the most dramatic.
- Received 31 May 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.217203
© 2010 The American Physical Society
Viewpoint
Domain walls riding the wave
Published 15 November 2010
Theorists propose a mechanism to induce domain-wall motion in ferromagnetic nanowires that may lead to unprecedented speeds.
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