MAGNETIC RECORDING MEDIUM, ITS MANUFACTURING METHOD, AND MAGNETIC RECORDING AND REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To enhance recording and reproducing characteristics and thermal fluctuation characteristics and to perform high density information recording and reproduction, in a magnetic recording medium. SOLUTION: The magnetic recording medium wherein at least a orientation controlling layer 3 controlling orientation properties of a directly upper layer, a vertical magnetic layer 4 whose easily magnetized axis is oriented principally vertically to a non-magnetic substrate 1 and a protective layer 5 are provided on the non-magnetic substrate 1 is characterized in that the vertical magnetic layer 4 consists of two or more magnetic layers and at least one layer of the magnetic layers consists of a layer 4a consisting essentially of Co and containing Pt and an oxide and at least one another layer consists of a layer 4b consisting essentially of Co, containing Cr and containing no oxide. COPYRIGHT: (C)2005,JPO&NCIPI