Invention Grant
- Patent Title: Magnetic recording medium and magnetic memory device including magnetic layers having granular structure of magnetic grains and grain boundary portion
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Application No.: US15596109Application Date: 2017-05-16
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Publication No.: US10008220B2Publication Date: 2018-06-26
- Inventor: Takayuki Fukushima , Yuji Murakami , Tetsuya Kanbe , Lei Zhang , Kazuya Niwa , Hisato Shibata
- 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: JP2016-119260 20160615
- Main IPC: G11B5/82
- IPC: G11B5/82 ; G11B5/187 ; G11B5/706 ; G11B5/74 ; G11B5/716 ; G11B5/855 ; G11B5/39 ; G11B5/66 ; G11B5/73 ; G11B5/84 ; G11B5/65

Abstract:
A magnetic recording medium includes a substrate; a lower base layer formed on the substrate; and a (001) oriented L10 magnetic layer formed on the lower base layer and including a first magnetic layer formed on the lower base layer and having a granular structure of magnetic grains and a grain boundary portion, the grain boundary portion containing C, and a second magnetic layer formed on the first magnetic layer and having a granular structure of magnetic grains and a grain boundary portion, the grain boundary portion containing oxide or nitride, the second magnetic layer further containing one or more elements selected from a group consisting of Mg, Ni, Zn, Ge, Pd, Sn, Ag, Re, Au and Pb as an additive.
Public/Granted literature
- US20170365279A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC MEMORY DEVICE Public/Granted day:2017-12-21
Information query
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