Effects of current on nanoscale ring-shaped magnetic tunnel junctions

Hong Xiang Wei, Jiexuan He, Zhenchao Wen, Xiu Feng Han, Wen Shan Zhan, Shufeng Zhang

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


We report the observation and micromagnetic analysis of current-driven magnetization switching in nanoscale ring-shaped magnetic tunnel junctions. When the electric current density exceeds a critical value of the order of 6× 106 A/ cm2, the magnetization of the two magnetic rings can be switched back and forth between parallel and antiparallel onion states. Theoretical analysis and micromagnetic simulation show that the dominant mechanism for the observed current-driven switching is the spin torque rather than the current-induced circular Oersted field.

Original languageEnglish
Article number134432
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number13
Publication statusPublished - 2008 Apr 17

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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