  We have developed a sensitive technique to probe the magnetic skyrmion phases
and dynamics by employing the interfacial coupling effect in a magnetoelectric
composite configuration. The study on a MnSi single crystal sample using this
technique provides clear evidences for the skyrmion lattice phase and
coexistence of skyrmion and conical phase. Above the Curie temperature TC, a
region with strong spin fluctuation is revealed as well. By tuning the density
of Skyrmion or disorder, a transition from the skyrmion lattice to
skyrmion-conical coexisting phase is observed. The observation is in good
agreement with a theoretical model which predicts the dissipation behavior in
the coexistence phase.
