Patent ID: 6756136
Filing Date: 2004-06-29
Classification: G11B,H01F

Abstract:
A magnetic recording medium, comprising:a substrate; a seedlayer directly disposed on the substrate, wherein the seedlayer comprises a Crâ€”X containing material and a portion of the seedlayer is oxidized; a non-oxidized Cr-containing first underlayer; a second underlayer can an HCP alloy; and a magnetic layer, in this order, wherein a solid solubility of said X is at least 3 atomic percent in Cr, and said X is selected from the group consisting of aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, zinc, or a mixture thereof, and further wherein grains of the seedlayer in the medium has a lower sigma/mean than that of an unoxidized seedlayer in a similar medium.