PROJECT TITLE :

Effects of Edge Taper on Domain Wall Structure and Current-Driven Walker Breakdown in a Ferromagnetic Thin Film Wire

ABSTRACT:

Domain walls in a very ferromagnetic skinny film wire with rectangular cross section adopt transverse wall (TW) or vortex wall (VW) geometries relying on the magnetic material and the wire width and thickness. But, experimentally wires will have a trapezoidal cross section if they're created by liftoff using an undercut resist profile. Micromagnetic modeling shows that tapering of the wire not solely promotes the formation of a TW over a VW, but conjointly will increase the critical current price and also the domain wall velocity at which Walker breakdown occurs, providing a potential route to higher speed domain wall devices.


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