Wire Width Dependence of Threshold Current Density for Domain Wall Motion in Co/Ni Nanowires

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 1.6×10 11 A/m 2 was...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2011-10, Vol.47 (10), p.3089-3091
Main Authors: Koyama, Tomohiro, Ono, Teruo, Chiba, Daichi, Ueda, Kohei, Tanigawa, Hironobu, Fukami, Shunsuke, Suzuki, Tetsuhiro, Ohshima, Norikazu, Ishiwata, Nobuyuki, Nakatani, Yoshinobu
Format: Article
Language:English
Subjects:
2-D magnetic recording
2-D neural network equalizer
Channel modeling
Cross-disciplinary physics: materials science
rheology
double-shielded reader sensitivity function
Exact sciences and technology
genetic algorithms
Magnetic domain walls
Magnetic domains
Materials science
Nanowires
Nickel
Other topics in materials science
Perpendicular magnetic anisotropy
Physics
Wires
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Summary: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 1.6×10 11 A/m 2 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.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2011.2157308