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US5763071A High areal density magnetic recording medium with dual magnetic layers 失效
具有双磁层的高密度磁记录介质

High areal density magnetic recording medium with dual magnetic layers
Abstract:
A magnetic recording medium having a high areal recording density of about 3 to about 20 Gb/in.sup.2, an Mrt of about 0.30 to about 0.60 memu/cm.sup.2, a coercivity greater than 2,500 Oersteds and a coercivity squareness of about 0.70 to about 0.95 is obtained by depositing one or more pairs of magnetic layers comprising a magnetically isotropic layer directly on a magnetically anisotropic layer. Chromium intermediate layers are employed to separate each pair of magnetically isotropic/anisotropic layers. In one embodiment, the magnetically anisotropic layer comprises a cobalt-base alloy containing chromium and tantalum and the magnetically isotropic layer comprises a cobalt-base layer containing chromium, platinum and tantalum.
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