Phase-change recording material and information recording medium
View Patent ↗A phase-change recording material on which high speed recording/erasing is possible, which has excellent recording characteristics, which has a high storage stability of recording signals and which is excellent in the repeated recording durability, and an information recording medium using the above material are provided. A phase-change recording material characterized by containing as the main component a composition represented by {(Sb 1−x Ge x ) 1−y In y } 1−z−w M z Te w wherein x, y, z and w are numbers satisfying 0.001≦x≦0.3, 0≦y≦0.4, 0≦z≦0.2 and 0≦w≦0.1, and M is at least one element selected from lanthanoids, provided that z and w are not 0 at the same time.
1. A phase-change recording material characterized by containing a composition represented by the following formula (1) as the main component:
{(Sb 1−x Ge x ) 1−y In y } 1−z−w M z Te w (1)
wherein x, y, z and w are numbers satisfying 0.001≦x≦0.3, 0≦y≦0.4, 0≦z≦0.2 and 0≦w≦0.1, and M is at least one element selected from lanthanoids, provided that z and w are not 0 at the same time.
2. The phase-change recording material according to claim 1 , wherein in the above formula (1), 0<z.
3. The phase-change recording material according to claim 1 , wherein in the above formula (1), z/y is at least 0 and at most 1.
4. The phase-change recording material according to claim 1 , wherein of the above phase-change recording material, the crystalline state corresponds to a non-recorded state and the amorphous state corresponds to a recorded state.
5. An information recording medium having a recording layer, characterized in that the above recording layer contains a composition represented by the following formula (1) as the main component:
{(Sb 1−x Ge x ) 1−y In y } 1−z−w M z Te w (1)
wherein x, y, z and w are numbers satisfying 0.001≦x≦0.3, 0≦y≦0.4, 0≦z≦0.2 and 0≦w≦0.1, and H is at least one element selected from lanthanoids, provided that z and w are not 0 at the same time.
6. The information recording medium according to claim 5 , wherein in the above formula (1), 0<z.
7. The information recording medium according to claim 5 , wherein in the above formula (1), z/y is at least 0 and at most 1.
8. The information recording medium according to claim 5 , wherein of the above information recording medium, the crystalline state corresponds to a non-recorded state and the amorphous state corresponds to a recorded state.
9. The information recording medium according to claim 5 , wherein the above information recording medium is an optical information recording medium.
10. The information recording medium according to claim 9 , wherein the above optical information recording medium further has a protective layer.
11. The information recording medium according to claim 9 , wherein the above optical information recording medium further has a reflective layer, and the reflective layer contains Ag as the main component.