Spin valve read element using a permanent magnet to form a pinned layer
US6754054B2 · kind B2 · utility
7Cited by
13References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Oct 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spin valve read element for use with, for example, magnetic recording media, includes a permanent magnet as one of the multilayers that make up the spin valve. The spin valve may also include a pinned ferromagnetic layer, an antiferromagnetic coupling inducing layer, a reference ferromagnetic layer, an electroconductive layer, and/or a free ferromagnetic layer. Epitaxy breaking layers may also be advantageously positioned within the spin valve. The multilayers of the spin valve may be constructed as a current perpendicular to the plane or a current parallel to the plane type spin valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.