| 摘要 |
<p>PURPOSE:To record information for magnetic recording while suppressing influence of heat on a substrate to the minimum by forming a heat insulating layer between a substrate and a magnetic recording layer to prevent thermal diffusion from the magnetic recording layer to the substrate even when the magnetic recording layer is heated. CONSTITUTION:Either the magnetic material in a first magnetic recording layer 4a or the magnetic material in a second magnetic recording layer 4b which constitute the magnetic recording layer 4 has higher coercive force and lower Currie temp. Tc than the other. In this medium, during magnetic recording is performed while heating, the distribution of temp. increase concentrates in the magnetic recording layer having a high coercive force and a low Currie temp. which is the upper second magnetic recording layer 4. Since diffusion of heat to the magnetic recording layer having a low coercive force and a high Currie temp. which is the lower first magnetic recording layer 4a is little, the Currie temp. of the first magnetic recording layer 4a is designed rather low and damages due to heat can be decreased.</p> |
