| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium, wherein a guard band part is easily worked even if widths of a recording track and the guard band part are made narrow when track density is increased, and high recording density recording can be realized, in a perpendicular magnetic recording system, and to provide a magnetic recording and reproducing apparatus. SOLUTION: In the perpendicular magnetic recording medium having at least a soft magnetic backing layer and a magnetic recording layer on a non-magnetic substrate, the magnetic recording layer comprises a granular structure containing at least Co, Pt and an oxide and consists of a concentric circle-shaped recording track part and the guard band part made of a non-magnetic material between track parts adjacent to each other, the magnetic recording layer has 6 to 18 nm thickness (t), a track pitch is 130 nm or shorter, the recording track part has≥50 nm width (D) and the ratio d/t of the width (d) of the guard band part to the thickness (t) of the magnetic recording layer is≥5/2. COPYRIGHT: (C)2006,JPO&NCIPI
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