Multilayer spin valve magneto-resistive effect magnetic head with free magnetic layer including two sublayers and magnetic disk drive including same
US5896252A · kind A · utility
143Cited by
10References
17Claims
0Family size
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Inventor
Key dates
| Filing date | May 2, 1997 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | May 2, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spin valve magnetoresistive effect magnetic head has a free magnetic layer having two sublayers composed of a CoFe sublayer and an NiFe sublayer. Alternatively, the two sublayers may be composed of a CoFe layer and an NiFe based alloy layer. The magnetic head further includes a nonmagnetic layer stacked on the CoFe layer, a pinned magnetic layer stacked on the nonmagnetic layer and an antiferromagnetic layer for fixing a magnetization direction of the pinned magnetic layer according to an exchange coupling between the pinned magnetic layer and the antiferromagnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.