| 摘要 |
A magnetic recording medium comprising first, second and third magnetic layers laminated in succession, wherein when (1) 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 (2) h1, respectively, and 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,at least and are 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, are satisfied,where
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