CPP reader with phase detection of magnetic resonance for read-back
US7633699B2 · kind B2 · utility
14Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2006 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | May 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a magnetically biased multilayer structure having a reference layer and a free layer separated by a spacer layer; a DC current source connected to the multilayer structure; an AC current source connected to the multilayer structure; and a phase detector for measuring a phase difference between an AC current and a voltage across the multilayer structure. A method performed by the apparatus is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.