  We demonstrate coherent control of time domain ferromagnetic resonance by all
electrical excitation and detection. Using two ultrashort magnetic field steps
with variable time delay we control the induction decay in yttrium iron garnet
(YIG). By setting suitable delay times between the two steps the precession of
the magnetization can either be enhanced or completely stopped. The method
allows for a determination of the precession frequency within a few precession
periods and with an accuracy much higher than can be achieved using fast
fourier transformation. Moreover it holds the promise to massively increase
precession amplitudes in pulsed inductive microwave magnetometry (PIMM) using
low amplitude finite pulse trains. Our experiments are supported by
micromagnetic simulations which nicely confirm the experimental results.
