| 摘要 |
PURPOSE:To increase the coercive force Hc without decreasing the residual magnetic flux density Br, to increase the thickness of a magnetic layer, to decrease the thickness of the substrate Cr film, and to reduce the cost by adding Pt to the in-plane magnetized film of Co-Ni on a nonmagnetic substrate through the Cr film. CONSTITUTION:Glass is used as the nonmagnetic substrate 1, and a Cr thin film 2 and a Co magnetic film 3 are coated on the substrate. The relation of the thickness of the Cr film and the coercive force Hc of the magnetic film of 85Co-10Ni-5Pt obtained by adding Pt to the in-plane magnetized film of Co-Ni and having 0.08mum thickness is shown in Figure 5, and simultaneously compared with the cases where 80Co-20Ni and 70Co-30Ni are used. The coercive force Hc of 85Co-10Ni-5Pt is greater than those of 80Co-20Ni and 70Co-30Ni even when the thickness of the Cr layer is decreased. Besides, the residual magnetic flux density Br is plotted against the Ni-content is Figure 6, and the residual magnetic flux density Br of 85Co-10Ni-5Pt is greater than those of other compositions.
|
