| 摘要 |
A magnetic recording medium including a ferromagnetic layer made of a Co-based alloy material, a nonmagnetic coupling layer formed on the ferromagnetic layer and made of Ru or a Ru-based alloy material, and a magnetic recording layer formed on the nonmagnetic coupling layer and made of a Co-based alloy material. The nonmagnetic coupling layer is formed by sputtering in an atmosphere of Ar-N2 mixed gas, so that the nonmagnetic coupling layer contains nitrogen. The partial pressure of nitrogen during the sputtering is set in the range of 6.7x10<-3 >to 3.7x10<-2 >Pa.
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