| 摘要 |
PURPOSE:To provide a data recording medium having a high erasure ratio and enabling repeated recording/erasure by low power. CONSTITUTION:In a data recording medium wherein a recording layer is provided on a substrate, the recording layer contains a substance represented by general formula CualphaInbetaSgammaSbdelta [wherein alpha is 5<=alpha<=20 (at%), beta is 10<=beta<=40 (at%), gammais 10<=gamma<=40 (at%), delta is 20<=delta<=80 (at%) AND alpha+beta+gamma+delta is 100]. |
