| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium capable of dealing with high density recording by reducing oxidation of ferromagnetic fine particles in a granular magnetic layer to suppress deterioration of magnetic characteristics and to provide a sputtering target suitable for manufacturing the perpendicular magnetic recording medium. SOLUTION: In the sputtering target which is used when a magnetic recording layer of the perpendicular magnetic recording medium provided with at least the magnetic recording layer 6 on a substrate 1 is film-deposited and comprises a ferromagnetic material and a metal oxide, the metal oxide is so formed that the number of oxygen atoms contained in the metal oxide is made smaller than that of a stoichiometric ratio. The perpendicular magnetic recording medium is obtained by film-depositing the magnetic recording layer by a sputtering method using the sputtering target for manufacturing the magnetic recording medium. COPYRIGHT: (C)2008,JPO&INPIT
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