Patent ID: 7897231

Claim:
An information recording medium for recording and/or reproducing information by applying light or electric energy, comprising: a material layer containing a material which includes Sn and Ga, and at least one element selected from a group GL consisting of Ta and Y, and oxygen, wherein the material is defined by the following formula: M h1 O i1 L i1 , wherein in the formula M denotes Sn and Ga, L denotes the at least one element selected from the group GL, and h 1 , i 1 , and j 1 are expressed on the basis of at % and satisfy the following: 5≦h 1 ≦40, 40≦i 1 ≦70, 0<j 1 ≦35, and h 1 +i 1 +j 1 =100.