Current-driven domain wall motion, nucleation, and propagation in a Co/Pt multi-layer strip with a stepped structure

Tetsuhiro Suzuki, Shunsuke Fukami, Kiyokazu Nagahara, Norikazu Ohshima, Nobuyuki Ishiwata

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have proposed detecting a domain wall behavior in a strip with perpendicular magnetic anisotropy by measuring both extraordinary Hall effect and domain wall resistance with unique placement of three via contacts. By using this detecting technique, we have confirmed that the domain wall can be initialized at the boundary of the stepped structure of a Co/Pt multilayer strip. We have observed nucleation independent of the current direction and the propagation depending on it. We could not find any domain wall motion by spin-transfer torque from the boundary until 1.8 × 1012 A/m2, probably because of the smaller polarization and/or the larger damping constant of the Co/Pt multilayer.

Original languageEnglish
Pages (from-to)2535-2538
Number of pages4
JournalIEEE Transactions on Magnetics
Volume44
Issue number11 PART 2
DOIs
Publication statusPublished - 2008 Nov
Externally publishedYes

Keywords

  • MRAM
  • Magnetic domain
  • Perpendicular magnetic anisotropy
  • Spintronics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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