Soft magnetic film having saturation magnetic flux density...

Details Soft magnetic film having saturation magnetic flux density... Soft magnetic film having saturation magnetic flux density...

2006-08-22

2006-08-22

Klimowicz, William J (Department: 2652)

Dynamic magnetic information storage or retrieval

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Core

Reexamination Certificate

active

07095586

ABSTRACT:
A soft magnetic film comprising an FeCo alloy containing noble metals such as Pr and Rh. This soft magnetic film has a saturation magnetic flux density Bs of at least 2.0 and high corrosion resistance. This soft magnetic film may be included in a thin-film magnetic head. A lower magnetic pole layer or an upper magnetic pole layer of the thin-film magnetic head has a composition represented by the formula FeXCoYαZ, wherein α is at least one element selected from the group consisting of Pd, Pt, Ru, and Ir, and wherein the ratio X/Y by mass percent of Fe to Co is in the range of 2 to 5, the α content Z is in the range of 0.5 to 18 mass percent, and X+Y+Z=100 mass percent.

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