Magnetic film, magnetic head of hard disk drive unit, and solid device

Abstract

In the magnetic film, projection of a magnetic pole, which is caused when a magnetic head is heated, can be restrained. The magnetic film can be applied to a magnetic head of a hard disk drive unit capable of recording data with high recording density. The magnetic film comprises: a first alloy film made of an alloy of iron (Fe) and platinum (Pt), or an alloy of iron (Fe), platinum (Pt) and other metal or metals; and a second alloy film directly layered on the first alloy film, the second alloy film made of an alloy of at least two metals selected from a group including iron (Fe), nickel (Ni) and cobalt (Co). Molar content of iron (Fe) in the first alloy film is 63-74 %.

1 . A magnetic film comprising an alloy film made of an alloy of at least iron (Fe), cobalt (Co) and platinum (Pt),
 wherein molar content of platinum (Pt) is 2% or more, and molar content of iron (Fe) is 69-70%.   
     
     
         2 . A magnetic head of a hard disk drive unit having a layered film, which includes a magnetic film comprising an alloy film made of an alloy of at least iron (Fe), cobalt (Co) and platinum (Pt),
 wherein molar content of platinum (Pt) is 2% or more, and molar content of iron (Fe) is 69-70%.   
     
     
         3 . A solid device including a magnetic film comprising an alloy film made of an alloy of at least iron (Fe), cobalt (Co) and platinum (Pt), wherein molar content of platinum (Pt) is 2% or more, and molar content of iron (Fe) is 69-70%.