Tunable magnetic domain wall oscillator at an anisotropy boundary

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We propose a magnetic domain wall (DW) oscillator scheme, in which a low dc current excites gigahertz angular precession of a DW at a fixed position. The scheme consists of a DW pinned at a magnetic anisotropy step in a perpendicularly magnetized nanostrip. The frequency is tuned by the current flowing through the strip. A perpendicular external field tunes the critical current density needed for precession, providing great experimental flexibility. We investigate this system using a simple one-dimensional model and full micromagnetic calculations. This oscillating nanomagnet is relatively easy to fabricate and could find application in future nanoscale microwave sources. © 2011 American Institute of Physics.
Originele taal-2Engels
Pagina's (van-tot)102512-1/3
TijdschriftApplied Physics Letters
Nummer van het tijdschrift10
StatusGepubliceerd - 2011

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