| 摘要 |
A magnetic recording medium, comprising a substrate (11), a Cr base layer (21) containing nitrogen in an amount less than 25 atm %, preferably 5 to 15 atm %, and a magnetic film (13) of Co alloy such as Co-Ni or Co-Ni-Cr alloy material deposited thereon, shows a clear improvement in medium noise level and S/N ratio over a conventional medium comprising a pure Cr base layer without nitrogen content. In case of about 10 atm % nitrogen content in the base layer, the medium noise level is reduced by half and the S/N ratio is improved by 6 to 9 dB, while the other magnetic characteristics such as coercivity Hc, residual magnetization Br, and squareness ratio Sq are remaining the same. |
