| 摘要 |
<p>A magnetic recording medium that is capable of realizing both high magnetic permeability and antiferromagnetic coupling for a soft magnetic underlayer. Namely, a5 magnetic recording medium including at least a non-magnetic substrate on which is laminated a soft magnetic underlayer formed by antiferromagnetic coupling of a pluralityof soft magnetic layers, and a perpendicular magnetic layer for which the axis of easy magnetization is oriented mainly perpendicularly to the non-magnetic substrate, wherein the soft magnetic layers contain Fe as a first main component, Co as a second main10 component, and also contain Ta, the soft magnetic underlayer is antiferromagnetically coupled using the second peak or a subsequently appearing peak of the antiferromagneticcoupling force, which changes according to the thickness of a spacer layer sandwiched between the plurality of soft magnetic layers, and the magnetic permeability of the soft magnetic underlayer is not less than 1,000 H/m.11111111.91111111.11111111111111111111111111111111111111111111111*G00002*</p> |
