For the first time Kirschner's group in Max Planck institute of Microstructure Physics showed that the signature of the large wave vector spin waves can be detected by spin polarized electron energy loss spectroscopy (SPEELS). Later, with a better momentum resolution, the spin wave dispersion was fully measured in 8 monolayer (ML) fcc cobalt film on Cu(001) and 8 ML hcp cobalt on W(110), respectively. Those spin waves were obtained up to the surface Brillouin zone (SBZ) at the energy range about few hundreds of meV. Another recent example is the investigation of 1 and 2 monolayer iron films grown on W(110) measured at 120 K and 300 K, respectively.