Longitudinal magnetic recording medium and storage having the same
A longitudinal magnetic recording medium includes, in order from a nonmagnetic substrate, a primary coat layer that contains Cr, an intermediate layer, a magnetic layer as a recording layer made of CoCr alloy, and a protective layer, the intermediate layer including a RuCr intermediate layer made of a RuCr alloy that contains 10 to 50 at % of Cr.
1 . A longitudinal magnetic recording medium comprising, in order from a nonmagnetic substrate, a primary coat layer that contains Cr, an intermediate layer, a magnetic layer as a recording layer made of CoCr alloy, and a protective layer, the intermediate layer including a RuCr intermediate layer made of a RuCr alloy that contains 10 to 50 at % of Cr.
2 . A longitudinal magnetic recording medium according to claim 1 , wherein the RuCr intermediate is made of the RuCr alloy that contains 25 to 36 at % of Cr.
3 . A longitudinal magnetic recording medium according to claim 1 , wherein the RuCr intermediate layer has a thickness between 1.0 nm and 2.5 nm.
4 . A longitudinal magnetic recording medium according to claim 1 , wherein the RuCr intermediate has 25 at % of Cr, the intermediate layer further including a ferromagnetic layer that is arranged closer to the nonmagnetic substrate than the RuCr intermediate layer and has a thickness between 1 nm and 4 nm.
5 . A longitudinal magnetic recording medium comprising, in order from a nonmagnetic substrate, a primary coat layer that contains Cr, an intermediate layer, a magnetic layer as a recording layer made of CoCr alloy, and a protective layer, the intermediate layer being a lamination of a layer that contains Co and a layer that contains RuCr, and the layer that contains Co being coupled with the recording layer via the layer that contains RuCr in an antiferromagnetic manner.
6 . A storage comprising a longitudinal magnetic recording medium according to claim 1 .
7 . A storage comprising a longitudinal magnetic recording medium according to claim 5 .