Co-Fe-Ni thin magnetic film, process for producing the same, composite thin film magnetic head, and magnetic recording device

摘要

A thin Co-Fe-Ni magnetic film comprising from 40% to 70% by weight of cobalt, from 20% to 40% by weight of iron, and from 10% to 20% of nickel, and having a crystal structure of a mixed crystal with an alpha phase of a body-centered cubic structure and a gamma phase of a face-centered cubic structure.