摘要 |
PURPOSE:To enable to record and erase information with low energy, by using a thin film of a material based on a Te-TeO2 material containing a relatively large amount of Te component with at least Sb, Ge and Au incorporated therein, in which the compositional ratios of the additives are specified. CONSTITUTION:The thin film is provided in which the relative values of the total number of atoms of Te-Sb-Ge and the numbers of atoms of Au and O lie in the shaded region A-E on Fig. 7 and the relative numbers of atoms of Te, Ge and Sb lie in the shaded region F-K on Fig. 8. Accordingly, by using the thin film of the five-element oxide system Te-O-Ge-Sb-Au, an optical information-recording member can be obtained which comprises Te as a main constituent for reversible change and has a combination of excellent characteristics owing to the respective effects of the constituents, namely, enhancement of thermal stability by Ge, enhancement of recording sensitivity by Sb, enhancement of erasing speed by Au, and enhancement of moisture resistance by O. |