Patent ID: 6887565
Filing Date: 2005-05-03
Classification: G11B,Y10S,Y10T

Abstract:
1. A magnetic recording medium comprising a non-magnetic substrate; a plurality of underlayers disposed on the non-magnetic substrate, at least one of the underlayers being composed of a Cr—Ti—B alloy which contains Cr as a main component and between 2% and 12% by atomic weight B; a lower magnetic layer having Co as a main component and between 10% and 16% by atomic weight Cr, the lower magnetic layer having a film thickness of between 1.5 nm to 4.5 nm, formed on an underlayer; a non-magnetic intermediate layer disposed on the lower magnetic layer; and an upper magnetic layer disposed on the non-magnetic intermediate layer, the upper magnetic layer containing Co as a main component and being coupled antiferromagnetically with the lower magnetic layer.