Invention Grant
- Patent Title: Perpendicular magnetic recording medium and magnetic storage apparatus
- Patent Title (中): 垂直磁记录介质和磁存储设备
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Application No.: US12403236Application Date: 2009-03-12
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Publication No.: US07824785B2Publication Date: 2010-11-02
- Inventor: Ryosaku Inamura , Yuta Toyoda
- Applicant: Ryosaku Inamura , Yuta Toyoda
- Applicant Address: JP Tokyo
- Assignee: Showa Denko K.K.
- Current Assignee: Showa Denko K.K.
- Current Assignee Address: JP Tokyo
- Agency: Greer, Burns & Crain, Ltd.
- Priority: JP2008-142917 20080530
- Main IPC: G11B5/66
- IPC: G11B5/66

Abstract:
A perpendicular magnetic recording medium includes a nonmagnetic seed layer, a nonmagnetic intermediate layer provided on the nonmagnetic seed layer, and a perpendicular recording layer provided on the nonmagnetic intermediate layer. The nonmagnetic seed layer includes a first seed layer made of a Ni alloy having a fcc structure, and a second seed layer provided between the first seed layer and the nonmagnetic intermediate layer and made of a Ni alloy having a fcc structure. A content of one or more elements other than Ni within the Ni alloy forming the second seed layer and having a Goldschmidt radius greater than that of Ni is larger than a content of one or more elements other than Ni within the Ni alloy forming the first seed layer and having a Goldschmidt radius greater than that of Ni.
Public/Granted literature
- US20090296274A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS Public/Granted day:2009-12-03
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