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    • 4. 发明授权
    • Corrosion resistant granular magnetic stack
    • 耐腐蚀颗粒磁性堆叠
    • US08728637B2
    • 2014-05-20
    • US12687751
    • 2010-01-14
    • Michael Zyee-Shan WuMason LuKueir W. ChourConnie C. LiuEdward T. YenLynn LiSteve Hwang
    • Michael Zyee-Shan WuMason LuKueir W. ChourConnie C. LiuEdward T. YenLynn LiSteve Hwang
    • G11B5/66
    • G11B5/66G11B5/65
    • A corrosion-resistant granular magnetic recording medium with improved recording performance comprises a non-magnetic substrate having a surface; and a layer stack on the substrate surface, including, in order from the surface: a granular magnetic recording layer; an intermediate magnetic de-coupling layer; and a corrosion preventing magnetic cap layer. The intermediate magnetic de-coupling layer has an optimal thickness and/or composition for: (1) promoting magnetic exchange de-coupling between the granular magnetic recording layer and the magnetic cap layer; and (2) reducing the dynamic closure field (Hcl) for determining writeability and eraseability of the medium. Grain boundaries of the magnetic cap layer are substantially oxide-free, and have a greater density and lower average porosity and surface roughness than those of the granular magnetic recording layer.
    • 具有改善的记录性能的耐腐蚀颗粒状磁记录介质包括具有表面的非磁性基材; 以及在所述基板表面上的层叠体,包括从所述表面开始的顺序:粒状磁记录层; 中间磁解耦层; 和防腐磁性层。 中间磁解耦层具有以下优化的最佳厚度和/或组成:(1)促进粒状磁记录层与磁帽层之间的磁交换去耦合; 和(2)减少用于确定介质的可写性和可擦除性的动态闭合场(Hcl)。 磁性盖层的晶粒边界基本上是无氧化物的,并且具有比颗粒状磁记录层的更大密度和更低的平均孔隙率和表面粗糙度。