| http://www.w3.org/ns/prov#value | - A first method for producing an information recording medium of the present invention is a method for producing an information recording medium containing an oxide-based material layer containing Zr, at least one element selected from the group GL1 consisting of La, Ga and In, and oxygen (O), comprising forming the oxide-based material layer by sputtering using a sputtering target containing Zr, a
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