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公开(公告)号：US20170140784A1
公开(公告)日：2017-05-18
申请号：US15127527
申请日：2015-03-19
发明人： Hiroaki SUKEGAWA , Zhenchao WEN , Seiji MITANI , Koichiro INOMATA , Takao FURUBAYASHI , Jason Paul HADORN , Tadakatsu OHKUBO , Kazuhiro HONO , Jungwoo KOO
CPC分类号： G11B5/653 , G11B5/3909 , G11B5/65 , G11B5/656 , G11B5/66 , G11B5/7315 , G11B5/7325 , G11B5/8404 , G11B5/851 , G11C11/161 , H01F10/123 , H01F10/30 , H01F10/3286
摘要： Disclosed is a perpendicularly magnetized film structure that uses a highly heat resistant underlayer film on which a cubic or tetragonal perpendicularly magnetized film can grow with high quality, the structure comprising any one substrate (5) of a cubic single crystal substrate having a (001) plane, or a substrate having a cubic oriented film that grows to have the (001) plane; an underlayer (6) formed on the substrate (5) from a thin film of a metal having an hcp structure, such as Ru or Re, in which the [0001] direction of the thin metal film forms an angle in the range of 42° to 54° with respect to the direction or the (001) orientation of the substrate (5); and a perpendicularly magnetized layer (7) located on the metal underlayer (6) and formed from a cubic material selected from the group consisting of a Co-based Heusler alloy, a cobalt-iron (CoFe) alloy having a bcc structure, and the like, as a constituent material, and grown to have the (001) plane.
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公开(公告)号：US20190172486A1
公开(公告)日：2019-06-06
申请号：US16214375
申请日：2018-12-10
发明人： Hiroaki SUKEGAWA , Zhenchao WEN , Seiji MITANI , Koichiro INOMATA , Takao FURUBAYASHI , Jason Paul HADORN , Tadakatsu OHKUBO , Kazuhiro HONO , Jungwoo KOO
IPC分类号： G11B5/65 , G11C11/16 , G11B5/39 , H01F10/32 , H01F10/30 , G11B5/73 , G11B5/66 , G11B5/84 , G11B5/851
摘要： Disclosed is a perpendicularly magnetized film structure using a highly heat resistant underlayer film on which a cubic or tetragonal perpendicularly magnetized film can grow, comprising a substrate of a cubic single crystal substrate having a (001) plane or a substrate having a cubic oriented film that grows to have the (001) plane; an underlayer formed on the substrate from a thin film of a metal having an hcp structure in which the [0001] direction of the thin metal film forms an angle in the range of 42° to 54° with respect to the direction or the (001) orientation of the substrate; and a perpendicularly magnetized layer located on the metal underlayer and formed from a cubic material selected from a Co-based Heusler alloy and a cobalt-iron (CoFe) alloy having a bcc structure a constituent material, and grown to have the (001) plane.
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