Exchange-coupled double-layered (ECDL) films were adopted to increase
density of magnetically induced superresolution (MSR) media by using c
enter aperture detection scheme, and to improve sensitivity of switchi
ng field simultaneously. A carrier to noise ratio of 40 dB was obtaine
d at 0.5 mu m recording marks produced by a switching field of 75 Oe.
Temperature dependence of interface wall energy affects recording/play
back characteristics of ECDL MSR disks considerably.