Wire width dependence of threshold current density for domain wall motion in Co/Ni nanowires

Tomohiro Koyama; Daichi Chiba; Kohei Ueda; Hironobu Tanigawa; Shunsuke Fukami; Tetsuhiro Suzuki; Norikazu Ohshima; Nobuyuki Ishiwata; Yoshinobu Nakatani; Teruo Ono

doi:10.1109/TMAG.2011.2157308

Wire width dependence of threshold current density for domain wall motion in Co/Ni nanowires

Tomohiro Koyama, Daichi Chiba, Kohei Ueda, Hironobu Tanigawa, Shunsuke Fukami, Tetsuhiro Suzuki, Norikazu Ohshima, Nobuyuki Ishiwata, Yoshinobu Nakatani, Teruo Ono

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

8 Citations (Scopus)

Abstract

The authors have investigated wire width dependence of threshold current density for current-induced magnetic domain wall (DW) motion in perpendicularly magnetized Co/Ni nanowires. Threshold current density decreased with reducing the wire width, and the lowest threshold value of 1.6× 10¹¹ A/m² was observed at the narrowest width of 36 nm. The micromagnetic simulation shows that the observed width dependence of threshold current density can be understood by the adiabatic spin transfer model.

Original language	English
Article number	6027788
Pages (from-to)	3089-3091
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	47
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2011.2157308
Publication status	Published - 2011 Oct
Externally published	Yes

Keywords

2-D magnetic recording
2-D neural network equalizer
Channel modeling
double-shielded reader sensitivity function
genetic algorithms

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2011.2157308

Cite this

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title = "Wire width dependence of threshold current density for domain wall motion in Co/Ni nanowires",

abstract = "The authors have investigated wire width dependence of threshold current density for current-induced magnetic domain wall (DW) motion in perpendicularly magnetized Co/Ni nanowires. Threshold current density decreased with reducing the wire width, and the lowest threshold value of 1.6× 1011 A/m2 was observed at the narrowest width of 36 nm. The micromagnetic simulation shows that the observed width dependence of threshold current density can be understood by the adiabatic spin transfer model.",

keywords = "2-D magnetic recording, 2-D neural network equalizer, Channel modeling, double-shielded reader sensitivity function, genetic algorithms",

author = "Tomohiro Koyama and Daichi Chiba and Kohei Ueda and Hironobu Tanigawa and Shunsuke Fukami and Tetsuhiro Suzuki and Norikazu Ohshima and Nobuyuki Ishiwata and Yoshinobu Nakatani and Teruo Ono",

note = "Funding Information: The authors would like to thank K. Kobayashi for useful discussion. This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO) and a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science.",

year = "2011",

month = oct,

doi = "10.1109/TMAG.2011.2157308",

language = "English",

volume = "47",

pages = "3089--3091",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Wire width dependence of threshold current density for domain wall motion in Co/Ni nanowires

AU - Koyama, Tomohiro

AU - Chiba, Daichi

AU - Ueda, Kohei

AU - Tanigawa, Hironobu

AU - Fukami, Shunsuke

AU - Suzuki, Tetsuhiro

AU - Ohshima, Norikazu

AU - Ishiwata, Nobuyuki

AU - Nakatani, Yoshinobu

AU - Ono, Teruo

N1 - Funding Information: The authors would like to thank K. Kobayashi for useful discussion. This work was supported in part by the New Energy and Industrial Technology Development Organization (NEDO) and a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science.

PY - 2011/10

Y1 - 2011/10

N2 - The authors have investigated wire width dependence of threshold current density for current-induced magnetic domain wall (DW) motion in perpendicularly magnetized Co/Ni nanowires. Threshold current density decreased with reducing the wire width, and the lowest threshold value of 1.6× 1011 A/m2 was observed at the narrowest width of 36 nm. The micromagnetic simulation shows that the observed width dependence of threshold current density can be understood by the adiabatic spin transfer model.

AB - The authors have investigated wire width dependence of threshold current density for current-induced magnetic domain wall (DW) motion in perpendicularly magnetized Co/Ni nanowires. Threshold current density decreased with reducing the wire width, and the lowest threshold value of 1.6× 1011 A/m2 was observed at the narrowest width of 36 nm. The micromagnetic simulation shows that the observed width dependence of threshold current density can be understood by the adiabatic spin transfer model.

KW - 2-D magnetic recording

KW - 2-D neural network equalizer

KW - Channel modeling

KW - double-shielded reader sensitivity function

KW - genetic algorithms

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JF - IEEE Transactions on Magnetics

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M1 - 6027788

ER -

Wire width dependence of threshold current density for domain wall motion in Co/Ni nanowires

Abstract

Keywords

ASJC Scopus subject areas

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