Effects of current on nanoscale ring-shaped magnetic tunnel junctions

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

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

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 (US)
Article number134432
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number13
DOIs
StatePublished - Apr 17 2008
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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