Title :
Structural Control of Domain Wall Depinning Fields in Nanostructured Fe Crossbar Patterns
Author :
Takashima, Takeshi ; Ito, Kei ; Noda, Kentaro ; Tanaka, T. ; Matsuyama, Kimihide
Author_Institution :
Grad. Sch. of Inf. Sci. & Electr. Eng., Kyushu Univ., Fukuoka, Japan
Abstract :
Domain wall (DW) pinning properties in Fe crossbar junctions with various nominal bar widths (100-380 nm) and film thicknesses (10-30 nm) are studied by magnetic force microscopy observation and micromagnetic simulation. The measured DW depinning fields present the marked bar width dependence as predicted from micromagnetic simulations. Simulation results suggest that the transverse DW is stabilized at the cross junction, and the depinning process is triggered by nonuniform magnetization rotation, taking the temporal buckling configuration.
Keywords :
iron; magnetic domain walls; magnetic force microscopy; magnetisation; Fe; domain wall depinning fields; magnetic force microscopy; magnetization rotation; micromagnetic simulation; nanostructured crossbar; size 10 nm to 30 nm; size 100 nm to 380 nm; structural property; temporal buckling configuration; Anisotropic magnetoresistance; Demagnetization; Iron; Junctions; Magnetic domain walls; Magnetization; Micromagnetics; Magnetic domains; magnetic force microscopy; micromagnetic simulation; nanostructured Fe crossbar;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2146760
