Invention Grant
- Patent Title: Magnetic recording medium, magnetic storage apparatus, and method for manufacturing magnetic recording medium
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Application No.: US17658003Application Date: 2022-04-05
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Publication No.: US11545176B2Publication Date: 2023-01-03
- Inventor: Takayuki Fukushima , Tomoo Shige , Yuji Umemoto , Kazuya Niwa
- Applicant: SHOWA DENKO K.K.
- Applicant Address: JP Tokyo
- Assignee: SHOWA DENKO K.K.
- Current Assignee: SHOWA DENKO K.K.
- Current Assignee Address: JP Tokyo
- Agency: IPUSA, PLLC
- Priority: JPJP2021-079564 20210510
- Main IPC: G11B5/00
- IPC: G11B5/00 ; G11B11/105 ; G11B5/65 ; G11B5/012 ; G11B5/127

Abstract:
A magnetic recording medium includes a substrate, and a magnetic recording layer including magnetic grains having an L10 structure. The magnetic recording layer is (001) oriented, and a surface of growth of the magnetic recording layer includes a (001) plane, a (111) plane, and planes equivalent to the (111) plane. An area ratio of the (111) plane and the planes equivalent to the (111) plane, represented by (A111+A111e)/(A001+A111+A111e), is in a range of 0.2 to 0.7, where A111 denotes an area of the (111) plane, A111e denotes an area of the planes equivalent to the (111) plane, and A001 denotes an area of the (001) plane.
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