Title :
Wire Width Dependence of Threshold Current Density for Domain Wall Motion in Co/Ni Nanowires
Author :
Koyama, Tomofumi ; Chiba, D. ; Ueda, Kazunori ; Tanigawa, H. ; Fukami, Shunsuke ; Suzuki, Takumi ; Ohshima, Naoki ; Ishiwata, N. ; Nakatani, Yusuke ; Ono, Takahito
Author_Institution :
Inst. for Chem. Res., Kyoto Univ., Kyoto, Japan
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 :
cobalt alloys; current density; ferromagnetic materials; magnetic domain walls; micromagnetics; nanomagnetics; nanowires; nickel alloys; Co-Ni; adiabatic spin transfer model; current-induced magnetic domain wall motion; micromagnetic simulation; perpendicularly magnetized Co-Ni nanowires; threshold current density; wire width dependence; Magnetic domain walls; Magnetic domains; Nanowires; Nickel; Perpendicular magnetic anisotropy; Wires; 2-D magnetic recording; 2-D neural network equalizer; Channel modeling; double-shielded reader sensitivity function; genetic algorithms;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2157308
