Thickness dependence of current-induced domain wall motion in a Co/Ni multi-layer with out-of-plane anisotropy

Hironobu Tanigawa, Tetsuhiro Suzuki, Shunsuke Fukami, Katsumi Suemitsu, Norikazu Ohshima, Eiji Kariyada

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Thickness dependence of current-induced domain wall (DW) motion in a perpendicularly magnetized [Co/Ni]N multilayered wire containing Ta/Pt capping and Pt/Ta seed layers has been studied. The thickness of the magnetic layer was controlled by the stacking number, N. The threshold current density for driving DW had a local minimum at N 3 and the velocity of DW motion decreased with N. Estimation of carrier spin polarization from measurements of DW velocity revealed that a thinner Co/Ni stack adjacent to the Pt layers reduced the carrier spin polarization and the strength of adiabatic spin transfer torque.

Original languageEnglish
Article number152410
JournalApplied Physics Letters
Volume102
Issue number15
DOIs
Publication statusPublished - 2013 Apr 15

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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