Tunable steady-state domain wall oscillator with perpendicular magnetic anisotropy

Details Tunable steady-state domain wall oscillator with perpendicular magnetic anisotropy Tunable steady-state domain wall oscillator with perpendicular magnetic anisotropy

2009-09-25

arxiv.org/abs/0909.4733v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures

Scientific paper

We theoretically study domain wall oscillations upon the injection of a dc current through a geometrically constrained wire with perpendicular magnetic anisotropy. The oscillation frequency spectrum can be tuned by the injected current density, but additionally by the application of an external magnetic field independent of the power. The results of analytical calculations are supported by micromagnetic simulations based on the Landau-Lifshitz-Gilbert equation. The simple concept of our localized steady-state oscillator might prove useful as a nanoscale microwave generator with possible applications in telecommunication or for rf-assisted writing in magnetic hard drives.

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