MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD THEREOF, AND MAGNETIC RECORDING DEVICE

摘要

Disclosed is a magnetic recording medium which allows both high magnetic permeability and antiferromagnetic coupling of a soft magnetic under-layer to be achieved. Specifically, the recording medium is created by layering at least a soft magnetic under-layer, which is formed by antiferromagnetic coupling of multiple soft magnetic layers, on a nonmagnetic substrate together with a vertical magnetic layer, the axis of easy magnetization of which is primarily oriented perpendicularly to the aforementioned nonmagnetic substrate. The soft magnetic layers of the magnetic recording medium contain Fe as a first primary component, Co as a second primary component, and Ta in addition. The soft magnetic under-layer is antiferromagnetically coupled using the second or a subsequently appearing peak of the antiferromagnetic coupling force that changes according to the thicknesses of spacer layers sandwiched between the multiple magnetic layers, and the magnetic permeability of the under-layer is 1000 H/m or greater.