| 摘要 |
A magnetic recording medium including first, second and third magnetic layers laminated in succession, wherein (1) when the magnetic wall energy density, saturation magnetization, magnetic wall coercivity and film thickness of the first magnetic layer at a temperature T represented by cgs unit system are defined as sigma1, Ms1, Hw1 and h1, respectively, (2) the magnetic wall energy density, saturation magnetization, magnetic wall coercivity and film thickness of the third magnetic layer are defined as sigma3, Ms3, Hw3 and h3, respectively, (3) the interface magnetic wall energy, density between the first magnetic layer and the third magnetic layer is defined as sigmaw13, and (4) the lowest temperature at which sigmaw13 is 0 erg/cm2 is Ts,andare satisfied at room temperature, andwhen a suitable temperature Tp is chosen, within a temperature range greater than the temperature Ts and lower by 10° C. or more than the Curie temperature Tc1 of the first magnetic layer,within a temperature range of about Ts to Tp,andare satisfied,where
|
