  We present the element-specific and time resolved visualization of uniform
ferromagnetic resonance excitations of a Permalloy (Py) disk - Cobalt (Co)
stripe bilayer microstructure. The transverse high frequency component of the
resonantly excited magnetization is sampled in the ps regime by a combination
of ferromagnetic resonance (FMR) and scanning transmission X-ray microscopy
(STXM- FMR) recording snapshots of the local magnetization precession of Py and
Co with nanometer spatial resolution. The approach allows us to individually
image the resonant dynamic response of each element, and we find that angular
momentum is transferred from the Py disk to the Co stripe and vice versa at
their respective resonances. The integral (cavity) FMR spectrum of our sample
shows an unexpected additional third resonance. This resonance is observed in
the STXM-FMR experiments as well and our microscopic findings suggest that it
is governed by magnetic exchange between Py and Co, showing for the Co stripe a
difference in relative phase of the magnetization due to stray field influence.
