Magnetic recording medium and method for its production
AssigneeAG Technology Co., Ltd.
InventorsAkihiro Murayama, Masao Miyamura
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Abstract
A magnetic recording medium having a magnetic thin film represented by the formula Co.sub.100-a-b-x-y-z Ni.sub.a Cr.sub.b Pt.sub.x M.sub.y Oz wherein a, b, x, y and z are atomic % satisfying 0.ltoreq.a.ltoreq.15, 0.ltoreq.b.ltoreq.15, 0<x.ltoreq.20, 0<y .ltoreq.20, 0<z.ltoreq.40, y+z.ltoreq.40, and a+b+x+y+z.ltoreq.60, and M is at least one element selected from the group consisting of Si, B, Zr, Al, Y, P, Ti, Sn and In.
Claims5
A magnetic recording medium having a magnetic thin film represented by the following formula CO.sub.100-a-b-x-y-z Ni.sub.a Cr.sub.b Pt.sub.x M.sub.y O.sub.z wherein a, b, x, y and z are atomic % satisfying 0.ltoreq.a.ltoreq.15, 0 .ltoreq.b.ltoreq.15, 0<x.ltoreq.20, 0<y.ltoreq.20, 0<z.ltoreq.40, y+z.ltoreq.40, and a+b+x+y+z.ltoreq.60, a and b not simultaneously being 0, and M is at least one element selected from the group consisting of Si, B, Zr, Al, P, Ti, Sn and In.
A magnetic recording medium having a magnetic thin film represented by the following formula Co.sub.100-a-b-x-y-z Ni.sub.a Cr.sub.b Pt.sub.x M.sub.y O.sub.z wherein a, b, x, y and z are atomic % satisfying 0.ltoreq.a.ltoreq.15, 0.ltoreq.b.ltoreq.15, 0 <x .ltoreq.20, 0<y .ltoreq.20, 0<z .ltoreq.40, y+z.ltoreq.40, and a+b+x+y+z .ltoreq.60, a and b not simultaneously being 0, and M is at least one element selected from the group consisting of Si, B, Zr, Al, P, Ti, Sn and In, prepared by the method which comprises forming the magnetic thin film by a sputtering method using a target having an oxide MO.sub.d, wherein 0<d.ltoreq.5, of at least one element selected from the group consisting of Si, B, Zr, Al, P, Ti, Sn and In incorporated into a base material of a CoNiPt alloy, a CoCrPt alloy or a CoNiCrPt alloy.
Dependencies are inferred from the claim text.