Toshifumi Kawano

Characteristics of R-MSR on groove recording

Magnetically induced super resolution (MSR) is one of the most promising way to achieve high recording density for MO. We reported a unique MSR method called R-MSR, that utilized magnetization reversal at high temperature area. In the R-MSR, super resolution effect can be achieved by signal enhancement at mark edge (Fig.l). The reversal can be realized by magneto-static coupling between readout layer and writing layer as shown in Fig.2. It can give high resolution that comparable to FAD or RAD without readout field. Since the edge signal is enhanced, the readout signal becomes first differentiation of ordinary MO signal, like magnetic media. Recently, groove recording type media was developed in conventional MO. It is said that the groove recording has lower noise level because of its U-shape groove. In this report, performance of R-MSR on groove recording was investigated.