Soft magnetic film having saturation magnetic flux density Bs of at least 2.0 T and magnetic head including the same
US7095586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2002 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Mar 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3967
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.