| 摘要 |
A phase-change recording material used for an information recording medium utilizing a crystalline state as a non-recorded state and an amorphous state as a recorded state, which has the composition of the following formula (1) as the main component: <?in-line-formulae description="In-line Formulae" end="lead"?>(Sb<SUB>1-x</SUB>Sn<SUB>x</SUB>)<SUB>1-y-w-z</SUB>Ge<SUB>y</SUB>Te<SUB>w</SUB>M1<SUB>z</SUB> formula (1) <?in-line-formulae description="In-line Formulae" end="tail"?> wherein each of x, y, z and w represents atomicity, x, z and w are numbers which satisfy 0.01<=x<=0.5, 0<=z<=0.3 and 0<=w<=0.1, respectively, and the element M1 is at least one element selected from the group consisting of In, Ga, Pt, Pd, Ag, rare earth elements, Se, N, O, C, Zn, Si, Al, Bi, Ta, W, Nb and V, and (I) when z=0 and w=0, y is a number which satisfies 0.1<=y<=0.3, (II) when 0<=z<=0.3 and w=0, y is a number which satisfies 0.05<=y<=0.3, and (III) when 0<=z<=0.3 and 0<w<=0.1, y is a number which satisfies 0.01<=y<=0.3.
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