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    • 13. 发明申请
    • Magnetic recording medium and magnetic storage device
    • 磁记录介质和磁存储装置
    • US20080096054A1
    • 2008-04-24
    • US11704880
    • 2007-02-09
    • Jun TaguchiYuki YoshidaKazuhisa ShidaNoriyuki AsakuraAkira Kikuchi
    • Jun TaguchiYuki YoshidaKazuhisa ShidaNoriyuki AsakuraAkira Kikuchi
    • G11B5/66
    • G11B5/7325
    • A magnetic recording medium includes a substrate having a surface where a texture is formed along a recording direction; a first underlayer formed on the surface of the substrate and made of Cr or CrMn; a second underlayer formed on the first underlayer and made of CrMn; a third underlayer formed on the second underlayer and made of Cr—X1 alloy wherein X1 includes a material selected from the group consisting of Mo, Ti, W, V, Ta, and Nb; and a recording layer formed on the third underlayer and made of a ferromagnetic material whose main ingredient is Co; wherein content of Mn of the second underlayer is greater than content of Mn of the first underlayer if the first underlayer is made of CrMn; and a total of film thicknesses of the first underlayer and the second underlayer is in a range between 2 nm and 7 nm.
    • 磁记录介质包括具有沿着记录方向形成纹理的表面的基板; 在基板表面上形成由Cr或CrMn制成的第一底层; 在第一底层上形成的由CrMn制成的第二底层; 在第二底层上形成的由Cr-X1合金制成的第三底层,其中X1包括选自Mo,Ti,W,V,Ta和Nb的材料; 以及形成在第三底层上并由主要成分为Co的铁磁材料制成的记录层; 如果第一底层由CrMn制成,则第二底层的Mn含量大于第一底层的Mn含量; 并且第一底层和第二底层的总膜厚度在2nm和7nm之间的范围内。