Fast Magnetic Domain-Wall Motion in a Ring-Shaped Nanowire Driven by a Voltage

Jia Mian Hu, Tiannan Yang, Kasra Momeni, Xiaoxing Cheng, Lei Chen, Shiming Lei, Shujun Zhang, Susan Trolier-Mckinstry, Venkatraman Gopalan, Gregory P. Carman, Ce Wen Nan, Long Qing Chen

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


Magnetic domain-wall motion driven by a voltage dissipates much less heat than by a current, but none of the existing reports have achieved speeds exceeding 100 m/s. Here phase-field and finite-element simulations were combined to study the dynamics of strain-mediated voltage-driven magnetic domain-wall motion in curved nanowires. Using a ring-shaped, rough-edged magnetic nanowire on top of a piezoelectric disk, we demonstrate a fast voltage-driven magnetic domain-wall motion with average velocity up to 550 m/s, which is comparable to current-driven wall velocity. An analytical theory is derived to describe the strain dependence of average magnetic domain-wall velocity. Moreover, one 180°domain-wall cycle around the ring dissipates an ultrasmall amount of heat, as small as 0.2 fJ, approximately 3 orders of magnitude smaller than those in current-driven cases. These findings suggest a new route toward developing high-speed, low-power-dissipation domain-wall spintronics.

Original languageEnglish (US)
Pages (from-to)2341-2348
Number of pages8
JournalNano letters
Issue number4
StatePublished - Apr 13 2016

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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