| 摘要 |
PROBLEM TO BE SOLVED: To prevent a magnetic recording layer from being degaussed or demagnetized by an outside floating magnetic field. SOLUTION: This magnetic recording medium has a multi-layer structure formed by disposing a nonmagnetic intermediate layer between the adjacent layers of plural soft magnetic layers. Such a soft magnetic backing layer is used, as has two peak differential values in a magnetization curve when a magnetic field is applied in the intra-film surface direction and the magnetization is reversed from the saturated magnetization state to the saturated state of the opposite direction. Otherwise, such another soft magnetic backing layer is used, that the adjacent soft magnetic layers combine antiferromagnetically with each other through the nonmagnetic intermediate layer when the outside magnetic field of fixed intensity or lower is applied and the magnetization directions of the adjacent soft magnetic layers become parallel to each other through the nonmagnetic intermediate layer when the outside magnetic field of fixed intensity or higher is applied.
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