Magnetic field driven domain-wall propagation in magnetic nanowires

Fast domain wall propagation under an optimal field pulse in magnetic nanowires.

We investigate field-driven domain wall (DW) propagation in magnetic nanowires in the framework of the Landau-Lifshitz-Gilbert equation. We propose a new strategy to speed up the DW motion in a uniaxial magnetic nanowire by using an optimal space-dependent field pulse synchronized with the DW propagation. Depending on the damping parameter, the DW velocity can be increased by about 2 orders of ...

Domain wall motion driven by an oscillating magnetic field

The coherent unidirectional motion of magnetic domain walls (DWs) is a key technology used in memory and logic device applications, as demonstrated in magnetic strips by electric current flow as well as in films by oscillation of a tilted magnetic field. Here we introduce a coherent unidirectional motion of DWs in the strip, utilizing an oscillating field, which is described within a previous 1...

Magnetic domain wall propagation under ferroelectric control

E. Mikheev,1 I. Stolichnov,1 E. De Ranieri,2 J. Wunderlich,2 H. J. Trodahl,3 A. W. Rushforth,4 S. W. E. Riester,1 R. P. Campion,4 K. W. Edmonds,4 B. L. Gallagher,4 and N. Setter1 1Ceramics Laboratory, EPFL-Swiss Federal Institute of Technology, Lausanne 1015, Switzerland 2Hitachi Cambridge Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom 3MacDiarmid Institute for Advanced Mater...

Simulations of Field Driven Domain Wall Interactions in Ferromagnetic Nanowires

Direct observation of stochastic domain-wall depinning in magnetic nanowires.

The stochastic field-driven depinning of a domain wall pinned at a notch in a magnetic nanowire is directly observed using magnetic x-ray microscopy with high lateral resolution down to 15 nm. The depinning-field distribution in Ni80Fe20 nanowires considerably depends on the wire width and the notch depth. The difference in the multiplicity of domain-wall types generated in the vicinity of a no...