Patent ID: 7282277
Filing Date: 2007-10-16
Classification: G11B

Abstract:
1. A magnetic recording medium including Cu-containing magnetic recording layers (CuML) comprised of a stacked bi-layer structure [Cr-rich CuML/Cr-poor CuML] n , where n=1 to 10 and said [Cr-rich CuML/Cr-poor CuML] bi-layer is comprised of a Cr-rich, Cu-containing magnetic recording layer (Cr-rich CuML) that includes a Cr-rich magnetic alloy material selected from the group consisting of: (a) a CoCrPtBCu alloy having a composition represented by the formula Co (b) a CoCrPtBCu alloy having a composition represented by the formula Co (c) a CoCrTaCu alloy having a composition represented by the formula Co a Cr-poor, Cu-containing magnetic recording layer (Cr-poor CuML) that includes a Cr-poor magnetic alloy material selected from the group consisting of: (d) a CoCrPtBCu alloy having a composition represented by the formula Co (e) a CoCrPtBCu alloy having a composition represented by the formula Co (f) a CoCrTaCu alloy having a composition represented by the formula Co