RECORDING LAYER FOR OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING MEDIUM, AND SPUTTERING TARGET

摘要

A recording layer for optical information recording medium excellent in recording property, an optical information recording medium including the recording layer, and a sputtering target useful for formation of the recording layer are provided. It relates to a recording layer for an optical information recording medium on which recording is performed through irradiation with a laser light, the recording layer comprising: an oxide of a metal X of which an absolute value of the standard free energy of oxide formation per 1 mol of oxygen is larger than those of Pd and Ag; a Pd oxide; and an Ag oxide, wherein a ratio of the Pd atom to a total of the metal X atom, the Pd atom and the Ag atom which are contained in the recording layer is from 10 to 60 atomic %, a ratio of the Ag atom to the total of the metal X atom, the Pd atom and the Ag atom is from 5 to 45 atomic %, and a ratio of a total of the Pd atom and the Ag atom to the total of the metal X atom, the Pd atom and the Ag atom is 75 atomic % or less.