Annealing effect on current-driven domain wall motion in Pt/[Co/Ni] wire

Masaki Furuta; Yang Liu; Hossein Sepehri-Amin; Kazuhiro Hono; Jian Gang Zhu

doi:10.1063/1.5001917

Annealing effect on current-driven domain wall motion in Pt/[Co/Ni] wire

Masaki Furuta, Yang Liu, Hossein Sepehri-Amin, Kazuhiro Hono, Jian Gang Zhu

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

2 Citations (Scopus)

Abstract

The annealing effect on the efficiency of current-driven domain wall motion governed by the spin Hall effect in perpendicularly magnetized Pt/[Co/Ni] wires is investigated experimentally. Important physical parameters, such as the Dzyaloshinskii-Moriya Interaction (DMI), spin Hall angle, and perpendicular anisotropy field strength, for the domain wall motion are all characterized at each annealing temperature. It is found that annealing of wires at temperatures over 120 °C causes significant reduction of the domain wall velocity. Energy dispersive X-ray spectroscopy analysis shows pronounced Co diffusion across the Pt/Co interface resulted from annealing at relatively high temperatures. The combined modeling study shows that the reduction of DMI caused by annealing is mostly responsible for the domain wall velocity reduction due to annealing.

Original language	English
Article number	113901
Journal	Journal of Applied Physics
Volume	122
Issue number	11
DOIs	https://doi.org/10.1063/1.5001917
Publication status	Published - 2017 Sept 21
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "The annealing effect on the efficiency of current-driven domain wall motion governed by the spin Hall effect in perpendicularly magnetized Pt/[Co/Ni] wires is investigated experimentally. Important physical parameters, such as the Dzyaloshinskii-Moriya Interaction (DMI), spin Hall angle, and perpendicular anisotropy field strength, for the domain wall motion are all characterized at each annealing temperature. It is found that annealing of wires at temperatures over 120 °C causes significant reduction of the domain wall velocity. Energy dispersive X-ray spectroscopy analysis shows pronounced Co diffusion across the Pt/Co interface resulted from annealing at relatively high temperatures. The combined modeling study shows that the reduction of DMI caused by annealing is mostly responsible for the domain wall velocity reduction due to annealing.",

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T1 - Annealing effect on current-driven domain wall motion in Pt/[Co/Ni] wire

AU - Furuta, Masaki

AU - Liu, Yang

AU - Sepehri-Amin, Hossein

AU - Hono, Kazuhiro

AU - Zhu, Jian Gang

PY - 2017/9/21

Y1 - 2017/9/21

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AB - The annealing effect on the efficiency of current-driven domain wall motion governed by the spin Hall effect in perpendicularly magnetized Pt/[Co/Ni] wires is investigated experimentally. Important physical parameters, such as the Dzyaloshinskii-Moriya Interaction (DMI), spin Hall angle, and perpendicular anisotropy field strength, for the domain wall motion are all characterized at each annealing temperature. It is found that annealing of wires at temperatures over 120 °C causes significant reduction of the domain wall velocity. Energy dispersive X-ray spectroscopy analysis shows pronounced Co diffusion across the Pt/Co interface resulted from annealing at relatively high temperatures. The combined modeling study shows that the reduction of DMI caused by annealing is mostly responsible for the domain wall velocity reduction due to annealing.

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Annealing effect on current-driven domain wall motion in Pt/[Co/Ni] wire

Abstract

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