A spin-wave frequency doubler by domain wall oscillation

Details A spin-wave frequency doubler by domain wall oscillation A spin-wave frequency doubler by domain wall oscillation

2009-02-13

arxiv.org/abs/0902.2321v1

Physics

Condensed Matter

Materials Science

8 pages, 3 figures

Scientific paper

We present a new mechanism for spin-wave excitation using a pinned domain wall which is forced to oscillate at its eigenfrequency and radiates spin waves. The domain wall acts as a frequency doubler, as the excited spin waves have twice the frequency of the domain wall oscillation. The investigations have been carried out using micromagnetic simulations and enable the determination of the main characteristics of the excited spin-waves such as frequency, wavelength, and velocity. This behavior is understood by the oscillation in the perpendicular magnetization which shows two anti-nodes oscillating out of phase with respect to each other.

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