抄録
With a combination of a high numerical aperture (NA) lens and a short wavelength laser, ultra high density over 100Gbit/in2 recording can be achieved by the Magnetic AMplifiying Magneto Optical System (MAMMOS). In MAMMOS, after the expansion of copied domain in the reading layer and getting high level read out signal, the domain should be collapsed for reading out next information. Then, the velocity of the expansion and shrinking of the domains is one of the most important parameters which corresponds to the high speed performance of MAMMOS. We have developed a new stroboscopic observation system by using an image intensifier with a high speed shutter as fast as 200ps for observing domain dynamics. By using the system, the domain shrinking processes are observed and the results are shown.
