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公开(公告)号：KR100834811B1
公开(公告)日：2008-06-09
申请号：KR1020060118143
申请日：2006-11-28
Applicant: 고려대학교 산학협력단
IPC: B32B9/04
CPC classification number: G11C11/16 , G01R33/098 , G11B5/3909 , G11B5/656 , G11B5/66 , G11C11/161 , H01F10/12 , Y10T428/1114
Abstract: 본 발명은 자기 랜덤 액세스 메모리(자기 메모리)(magnetic random access memory)에 사용하는 자기 이방성 다층박막에 관한 것으로, 구체적으로는 다층의 CoFeSiB/Pt 막을 포함하는 자기 이방성 다층박막에 관한 것이다.
자기 이방성 다층 박막, 자기 메모리, 자기 저항비, 스위칭 자기장-
公开(公告)号：KR100791731B1
公开(公告)日：2008-01-03
申请号：KR1020070000997
申请日：2007-01-04
Applicant: 고려대학교 산학협력단
CPC classification number: C01G49/08 , B82Y25/00 , C01P2002/72 , C01P2002/77 , C01P2004/04 , C01P2004/84 , C01P2006/60 , H01F1/0054 , H01F1/36
Abstract: Magnetic core-ceramic shell nanocrystals are provided to have both magnetic properties and ceramic properties, a high degree of crystallinity, and a uniform crystal size distribution. A method for preparing magnetic core-ceramic shell nanocrystals having complex functions includes the steps of: mixing a magnetic core material precursor with a reductant for the core material precursor; mixing the magnetic core material precursor with a solvent for the reductant to form a first mixture solution; heating the first mixture solution to a first temperature and keeping the solution at the same temperature for a first time; cooling the first mixture solution to room temperature to form the magnetic core material; mixing the magnetic core material with a ceramic shell material precursor to form a second mixture solution; heating the second mixture solution to a second temperature and keeping the solution at the same temperature for a second time; and cooling the second mixture solution to a second temperature to coat the magnetic core material with the ceramic shell material. Further, method for preparing magnetic core-ceramic shell nanocrystals having complex functions additionally includes educing the nanocrystals having complex functions by adding an ethanol, separating by using a centrifuge.
Abstract translation: 提供磁芯 - 陶瓷壳纳米晶体具有磁性和陶瓷性质，高结晶度和均匀的晶体尺寸分布。 制备具有复杂功能的磁芯 - 陶瓷壳纳米晶体的方法包括以下步骤：将磁芯材料前体与芯材前体的还原剂混合; 将磁芯材料前体与用于还原剂的溶剂混合以形成第一混合物溶液; 将第一混合溶液加热至第一温度并将溶液保持在相同温度下第一次; 将第一混合溶液冷却至室温以形成磁芯材料; 将磁芯材料与陶瓷壳材料前体混合以形成第二混合物溶液; 将第二混合溶液加热至第二温度并将溶液保持在相同温度下第二次; 并将所述第二混合物溶液冷却至第二温度以用所述陶瓷壳材料涂覆所述磁芯材料。 此外，制备具有复杂功能的磁性核 - 陶瓷壳纳米晶体的方法还包括通过加入乙醇来教导具有复杂功能的纳米晶体，通过使用离心机分离。
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公开(公告)号：KR1020080048151A
公开(公告)日：2008-06-02
申请号：KR1020060118143
申请日：2006-11-28
Applicant: 고려대학교 산학협력단
IPC: B32B9/04
CPC classification number: G11C11/16 , G01R33/098 , G11B5/3909 , G11B5/656 , G11B5/66 , G11C11/161 , H01F10/12 , Y10T428/1114
Abstract: A CoFeSiB/Pt(Cobalt-Ferrum-Silicone-Boron/Platinum) multi-layer thin film with perpendicular magnetic anisotropy is provided to secure low coercivity, remanent magnetization similar to saturation magnetization, and low saturation magnetization and to minimize the consumption of power. A CoFeSiB/Pt multi-layer thin film with perpendicular magnetic anisotropy is composed of: a first Pt/CoFeSiB layer; a second Pt/CoFeSiB layer formed on the first Pt/CoFeSiB layer; a third Pt/CoFeSiB layer formed on the second Pt/CoFeSiB layer; and a fourth Pt/CoFeSiB layer formed on the third Pt/CoFeSiB layer. The thickness ratio of the first and second Pt/CoFeSiB layers is 1:1. Coercivity of the multi-layer thin film with perpendicular magnetic anisotropy is below 200e. If the thickness of Pt is 8 angstroms, the thickness of CoFeSiB is 3 angstroms. Or, if the thickness of CoFeSiB is 3 angstroms, Pt is over 14 angstroms.
Abstract translation: 提供具有垂直磁各向异性的CoFeSiB / Pt（钴 - 铁 - 硅 - 硼/铂）多层薄膜，以确保低矫顽力，与饱和磁化强度相似的剩余磁化和低饱和磁化强度，并最大限度地减少功率消耗。 具有垂直磁各向异性的CoFeSiB / Pt多层薄膜由以下部分组成：第一Pt / CoFeSiB层; 形成在第一Pt / CoFeSiB层上的第二Pt / CoFeSiB层; 形成在第二Pt / CoFeSiB层上的第三Pt / CoFeSiB层; 以及形成在第三Pt / CoFeSiB层上的第四Pt / CoFeSiB层。 第一和第二Pt / CoFeSiB层的厚度比为1:1。 具有垂直磁各向异性的多层薄膜的矫顽力低于200e。 如果Pt的厚度为8埃，CoFeSiB的厚度为3埃。 或者，如果CoFeSiB的厚度为3埃，则Pt超过14埃。
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