| 摘要 |
A magnetic recording medium has a non-magnetic ground layer, a non-magnetic recording layer, a protecting layer formed sequentially on a non-magnetic substrate, one on top of another. A double-layered non-magnetic ground layer consists of a pure chromium layer, positioned closer to a substrate, and a chromium-molybdenum-tungsten ternary alloy layer, positioned closer to a magnetic recording layer. This provides the non-magnetic recording layer formed on such a ground layer with cobalt alloy grains having uniform dimensions. The resulting magnetic recording medium has an excellent SNR.
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