Observation of the intrinsic Abraham force in time-varying magnetic and   electric fields
  The Abraham force exerted by a time-dependent electromagnetic field on neutral, polarizable matter has two contributions. The one induced by a time-varying magnetic field and a static electric field is reported here for the first time. We discuss our results in the context of the radiative momentum in matter. Our observations are consistent with Abraham's and Nelson's versions for radiative momentum. 
Geert L. J. A. Rikken (LNCMI, LNCMI), Bart Van Tiggelen (LPMMC)
physics.optics