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

doi:10.1063/1.4802266

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

RIEC - Computing System Platforms Division

Renesas Electronics Corporation

Research output: Contribution to journal › Article › peer-review

24 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 language	English
Article number	152410
Journal	Applied Physics Letters
Volume	102
Issue number	15
DOIs	https://doi.org/10.1063/1.4802266
Publication status	Published - 2013 Apr 15

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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.",

author = "Hironobu Tanigawa and Tetsuhiro Suzuki and Shunsuke Fukami and Katsumi Suemitsu and Norikazu Ohshima and Eiji Kariyada",

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AU - Tanigawa, Hironobu

AU - Suzuki, Tetsuhiro

AU - Fukami, Shunsuke

AU - Suemitsu, Katsumi

AU - Ohshima, Norikazu

AU - Kariyada, Eiji

N1 - Funding Information: We thank Professor D. Chiba and Professor T. Ono for fruitful discussions. A portion of this research was supported by the Japan Society for the Promotion of Science (JSPS) through its “Funding Program for World-Leading Innovation R&D on Science and Technology (FIRST Program).”

PY - 2013/4/15

Y1 - 2013/4/15

N2 - 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.

AB - 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.

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

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