Magnetic recording medium having a prelayer

摘要

An improvement in a magnetic recording medium having an underlayer and a magnetic recording layer is described. The improvement, effective to reduce media anisotropy, includes deposition of a prelayer on the substrate, prior to deposition of the underlayer. The prelayer is deposited to a thickness of between 10-60 ANGSTROM and is composed of an CoCr-based alloy having a defined saturation magnetization.