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AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsKazue Kudo, Gen Oikawa, Youji Maruyama, Hiromi Shiina
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Embodiments of the invention provide a magnetic film capable of providing a higher saturation magnetic flux density as compared with the conventional one, a process of forming the magnetic film, a thin film magnetic head that makes use of the magnetic film, and a magnetic disk drive having this thin film magnetic head. In one embodiment, a magnetic film contains Co, Ni, and Fe, and its composition is such that 10≦Co<20 wt %, 0≦Ni≦2 wt %, and 80<Fe≦90 wt %. This magnetic film is a plating layer formed by electroplating. The face interval variation of crystal surface perpendicular to the layer surface relative to a crystal surface parallel to the layer surface is about 0.4% or more, whereby the saturation magnetic flux density (Bs) is greater than about 2.4 T.
A magnetic film containing Co, Ni, and Fe, wherein the magnetic film is formed by plating, a composition of the magnetic film is such that 10≦Co<20 wt %, 0<Ni≦2 wt %, and 80<Fe≦90 wt %, a face interval variation of crystal surface perpendicular to a layer surface relative to a crystal surface parallel to the layer surface is about 0.4% or more, and a saturation magnetic flux density of the magnetic film is greater than about 2.4 teslas.
Dependencies are inferred from the claim text.