公开(公告)号：US4654276A

公开(公告)日：1987-03-31

申请号：US857019

申请日：1986-04-29

申请人： Richard H. Ahlert ,  James K. Howard ,  Grace S. Lim

发明人： Richard H. Ahlert ,  James K. Howard ,  Grace S. Lim

IPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/73 ,  G11B5/738 ,  G11B5/82 ,  B32B15/00

CPC分类号： G11B5/7325 ,  G11B5/64 ,  Y10S428/928 ,  Y10T428/12597 ,  Y10T428/12625 ,  Y10T428/12674 ,  Y10T428/12743 ,  Y10T428/1275 ,  Y10T428/12861 ,  Y10T428/12875 ,  Y10T428/12937 ,  Y10T428/12944

摘要： An improved cobalt-platinum (CoPt) thin film metal alloy media for horizontal magnetic recording has a coercivity substantially greater than prior CoPt thin film metal alloy media. A tungsten underlayer between the substrate and the CoPt magnetic layer improves the coercivity above that of media wiht conventional underlayers, such as chromium. The coercivity of the CoPt layer can be increased even further if the CoPt film is deposited in such a manner as to form an intermetallic compound of Co.sub.3 W in the interface region between the tungsten underlayer and the CoPt magnetic layer. The tungsten underlayer also improves the magnetic properties of the media when the magnetic layer is an alloy of cobalt-platinum-chromium (CoPtCr).

摘要翻译： 用于水平磁记录的改进的钴 - 铂（CoPt）薄膜金属合金介质的矫顽力显着大于先前的CoPt薄膜金属合金介质。 在基底和CoPt磁性层之间的钨底层使矫顽力提高到常规底层如铬的介质的矫顽力。 如果CoPt膜以在钨底层和CoPt磁性层之间的界面区域中形成Co 3 W的金属间化合物的方式沉积，CoPt层的矫顽力可以进一步提高。 当磁性层是钴 - 铂 - 铬（CoPtCr）的合金时，钨底层也改善了介质的磁特性。

公开(公告)号：US4749628A

公开(公告)日：1988-06-07

申请号：US857206

申请日：1986-04-29

申请人： Richard H. Ahlert ,  James K. Howard ,  Grace S. Lim

发明人： Richard H. Ahlert ,  James K. Howard ,  Grace S. Lim

IPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/706 ,  G11B5/73 ,  G11B5/738 ,  H01F10/16 ,  H01F10/30

CPC分类号： G11B5/64 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12806 ,  Y10T428/12861

摘要： A vertical magnetic recording medium is formed of multiple layers, each layer comprising a cobalt-platinum (CoPt) magnetic film formed on a hexagonal-close-packed (HCP) necleating film. The thickness of each CoPt film in each layer is sufficiently thin to assure that the film has perpendicular magnetic anisotropy. The magnetic properties of the multilayered magnetic film structure can be varied by varying the thickness of the individual films and the number of layers.

摘要翻译： 垂直磁记录介质由多层构成，每一层包括形成在六方密堆积（HCP）膜片上的钴 - 铂（CoPt）磁性膜。 每层中每个CoPt膜的厚度足够薄，以确保膜具有垂直的磁各向异性。 可以通过改变单个膜的厚度和层数来改变多层磁性膜结构的磁性能。