| 摘要 |
PURPOSE:To obtain a data recording membrane having good recording/ reproduction characteristics, high sensitivity and good stability by setting the average composition of the data recording membrane in the membrane thickness direction thereof to a composition represented by a specific formula. CONSTITUTION:The data recording membrane represented by the formula SbxTeyAzBalphaCbetaDgamma (wherein x, y, z, alpha, beta and gamma have values of 5<=x<=70, 10<=y<=85, 3<=z<=50, 0<=alpha<=20, 0<=beta<=30 and 0<=gamma<=30 in atomic %, A is at least one element selected from Sn, Bi, Pb, Ga, Au and In, B is at least one element selected from Tl,a halogen element and alkali metal, C is at least one element selected from Ag, Cu, Pd, Ta, W, Ir, Sc, Y, Ti, Zr, V, Nb, Cr, Mo, Mn, Fe, Ru, Co, Rh and Ni and D is Sb, Te or an element other than the elements represented by A, B and D) formed to a substrate directly or through a protective layer is irradiated with recording beam to change the atom arrangement of the irradiated part. This membrane is irradiated with reproducing beam to read a change of atomic arrangement to record and reproduce data. |
