Thin film magnetic head and manufacturing method thereof

A magnetic recording device comprising:

• a thin film magnetic head comprising,
• a write head including at least a main magnetic pole, a yoke, and a return pole, wherein a magnetic film comprising at least a part of the main magnetic pole, the yoke, or the return pole, is formed by alternately plating first magnetic layers and second magnetic layers, each of the first magnetic layers being of the body-centered cubic phase and containing at least two of the elements Co, Ni and Fe, and each of the second magnetic layers being of the face-centered cubic phase and containing at least two of the elements Co, Ni and Fe;
• and
• a magnetic recording medium which is accessed by the thin film magnetic head.

A method for manufacturing a thin film magnetic head comprising a write head including a main magnetic pole, a yoke, and a return pole, the method comprising:

• forming a magnetic film which comprises at least a part of the main magnetic pole, the yoke, or the return pole by alternately repeating,
• first applying a current at a density of 150 mA/cm2 or more into a plating bath containing ions of at least two of Co, Ni, and Fe, and a complex of S, and has a pH kept at 2.0 or lower;
• and then
• applying a current at a density below 150 mA/cm2.