Abstract: A soft magnetic thin film in which the recording magnetic field in the perpendicular direction can be preferentially intensified and sharply controlled when the thin film is applied to a perpendicular magnetic recording medium is provided. This soft magnetic thin film can be obtained by immersing a substrate into an electroless plating bath that contains a Co ion, Fe ion, and Ni ion as metal ions, as well as a completing agent and a boron-type reducing agent, wherein the content ratios of the metal ions on the mole basis are 0.15? (Ni ion amount/the amount of total metal ions) ?0.40, 0.50? (Co ion amount/the amount of total metal ions) ?0.80, and 0.05? (Fe ion amount/the amount of total metal ions) ?0.15; and carrying out electroless plating in a magnetic field in a range of 5-2,000 Oe given in a direction parallel to the surface of said substrate.

Abstract: A perpendicular magnetic recording medium is disclosed that is able to prevent the Wide Area Track Erasure phenomenon from occurring and is capable of high density recording. The perpendicular magnetic recording medium includes a substrate; a soft-magnetic backup stack structure including a first magnetic layer, a first non-magnetic coupling layer, and a second magnetic layer stacked on the substrate in order; an intermediate layer formed from a non-magnetic material on the soft-magnetic backup stacked structure; and a recording layer on the intermediate layer, the recording layer having an easy axis of magnetization perpendicular to the surface of the substrate.

Abstract: The magnetic thin film has high saturation magnetic flux density and superior soft magnetic characteristics. The magnetic thin film of the present invention comprises: a base layer being made of FeCo/NiFe; and a plated layer being formed on the base layer, the plated layer being made of FeCo.

Abstract: A soft magnetic thin film in which the recording magnetic field in the perpendicular direction can be preferentially intensified and sharply controlled when the thin film is applied to a perpendicular magnetic recording medium is provided. This soft magnetic thin film can be obtained by immersing a substrate into an electroless plating bath that contains a Co ion, Fe ion, and Ni ion as metal ions, as well as a complexing agent and a boron-type reducing agent, wherein the content ratios of the metal ions on the mole basis are 0.15?(Ni ion amount/the amount of total metal ions) ?0.40, 0.50?(Co ion amount/the amount of total metal ions) ?0.80, and 0.05?(Fe ion amount/the amount of total metal ions) ?0.15; and carrying out electroless plating in a magnetic field in a range of 5-2,000 Oe given in a direction parallel to the surface of said substrate.

Abstract: The magnetic thin film has high saturation magnetic flux density and superior soft magnetic characteristics. The magnetic thin film of the present invention comprises: a base layer being made of FeCo/NiFe; and a plated layer being formed on the base layer, the plated layer being made of FeCo.