Domain Wall Propagation Nanowire

Domain wall propagation in cylindrical nanowires with modulations of diameter is a key phenomenon to design physics oriented devices or a disruptive three dimensional magnetic memory.

Domain wall propagation nanowire. Owing to their reduced size and dimensionality the characterization of domain wall motion is an important problem. The effect depends on the sense and magnitude of the electrical current and allows direct propagation of domain walls through complex. In current driven dw propagation many efforts have been devoted to high dw velocity and low current density in order to optimize de vice performance.

Here we show that the velocity field. The helicoidal vortex domain wall nucleation field 1460 oe is identical for both dmnws geometry and corresponds to the vortex domain wall nucleation field for the wide homogenous nanowire. Magnetic domain walls which separate regions of opposing magnetization in a nanowire can be manipulated and used to encode information for storage or to perform logic operations.

Magnetic domain wall dw motion along a nanowire underpins many proposals of spintronic devices1 2. Vortex domain wall propagation in periodically modulated diameter fecocu nanowire as determined by the magneto optical kerr effect ester m palmero cristina bran rafael p del real and manuel vázquez institute of materials science of madrid csic 28049 madrid spain e mail. However the domain wall dynamics in nanowires has only been investigated8 13 inthelastfiveyears and some results indicate a drastic slowing down of wall motion in higher magnetic fields8.

We demonstrate movement of a head to head domain wall through a magnetic nanowire simply by passing an electrical current through the domain wall and without any external magnetic field applied. To compete with other technologies high speed operation and hence fast wall propagation is essential. Domain wall propagation in wavy ferromagnetic nanowire.

Epalmero icmm csic es received 2 september 2015 revised 24 september. We investigate field driven domain wall dw propagation in magnetic nanowires in the framework of the landau lifshitz gilbert equation. High dw propagation velocity is obviously important because it determines the device speed.

Domain wall motion is an important problem. Geometrical dependence of domain wall propagation and nucleation fields in magnetic domain wall sensors b.