| 摘要 |
The data storage device (2) comprises a substrate (A) with a storage layer (4) and a magnetic head (K) with two magnetic arms (7, 8). Each magnetic arm has a magnetic layer (7a, 8a) forming a magnetic pole (P1, P2) and a magnetic reinforcing layer (7b, 8b) outside the pole region. Here, the reinforcing layers (7b, 8b) represent parts of the outsides of the head (K). In addition, the head (K) is so arranged that it records virtually only with its leading magnetic arm (7). According to the invention, the storage layer (4) is applied to a weakly magnetised sub-layer (5) of thickness Du and magnetic saturation MSu so that Du * MSu >/= 1.2 * D1 * MS1, where D1 is the thickness and MS1 the magnetic saturation of the magnetic layer (7a) of the leading magnetic arm (7). |
