Magnetization reversal in the anisotropy-dominated regime using time-dependent magnetic fields

Details Magnetization reversal in the anisotropy-dominated regime using time-dependent magnetic fields Magnetization reversal in the anisotropy-dominated regime using time-dependent magnetic fields

2005-11-21

arxiv.org/abs/cond-mat/0511497v1

Physics

Condensed Matter

Materials Science

Scientific paper

We study magnetization reversal using various r.f. magnetic pulses. We show numerically that switching is possible with simple sinusoidal pulses; however the optimum approach is to use a frequency-swept (chirped) r.f. magnetic pulse, the shape of which can be derived analytically. Switching times of the order of nanoseconds can be achieved with relatively small r.f. fields, independent of the anisotropy's strength.

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