Invention Grant
- Patent Title: Magnetic recording medium
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Application No.: US16945582Application Date: 2020-07-31
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Publication No.: US11430477B2Publication Date: 2022-08-30
- Inventor: Masaru Terakawa , Yoichi Kanemaki , Minoru Yamaga
- Applicant: Sony Corporation
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: JPJP2013-219182 20131022
- Main IPC: G11B5/70
- IPC: G11B5/70 ; G11B5/706

Abstract:
A magnetic recording medium includes a nonmagnetic support body, and a magnetic layer containing magnetic powder, in which the magnetic powder contains ε-Fe2O3 crystal (including a case of substituting a portion of Fe site with a metal element M), a product of residual magnetization and a thickness of the magnetic layer is from 0.5 mA to 6.0 mA, and a squareness ratio which is measured in a longitudinal direction of the magnetic layer is 0.3 or less.
Information query
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