Minimization of Ohmic losses for domain wall motion in a ferromagnetic nanowire

O. A. Tretiakov, Y. Liu, Ar Abanov

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

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.

Original languageEnglish
Article number217203
JournalPhysical review letters
Volume105
Issue number21
DOIs
Publication statusPublished - 2010 Nov 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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