Patent ID: 6761982
Filing Date: 2004-07-13
Classification: G11B,Y10S

Abstract:
A magnetic recording disk comprising a non-magnetic substrate, an orientation-determining layer, a non-magnetic undercoat layer, a magnetic layer, and a protective layer, in order, wherein:the non-magnetic undercoat layer has a bcc structure; the orientation-determining layer causes the non-magnetic undercoat layer to have a predominant orientation plane of (200) and has a crystal structure in which columnar crystal grains are inclined in a radial direction; the ratio of a coercive force in a circumferential direction of the magnetic layer (Hcc) to a coercive force in a radial direction of the magnetic layer (Her) is more than 1; and the magnetic layer includes a plurality of magnetic films having an hcp structure and a predominant orientation plane of (110), and permits antiferromagnetic bonding to be formed therebetween.