Patent ID: 9358612
Filing Date: 2016-06-07
CPC Classification: B22F,C22C,C23C,G11B,H01J

Claim Text:
1. An FePt-based sputtering target comprising Fe, Pt, a metal oxide, and further comprising one or more kinds of metal elements other than Fe and Pt, wherein the FePt-based sputtering target has a structure in which an FePt-based alloy phase and a metal oxide phase containing unavoidable impurities are mutually dispersed, the FePt-based alloy phase containing Pt in an amount of 40 at % or more and less than 60 at % and the one or more kinds of metal elements other than Fe and Pt in an amount of more than 0 at % and 20 at % or less with the balance being Fe and unavoidable impurities and with a total amount of Pt and the one or more kinds of metal elements being 60 at % or less, the metal oxide is contained in an amount of 20 vol % or more and 40 vol % or less based on a total amount of the target, and the metal oxide phase has an average size of 0.4 μm or less as determined by an intercept method.