Transducer utilizing giant magnetoresistance effect and having a ferromagnetic layer pinned in a direction perpendicular to a direction of a signal magnetic field
US6084405A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1997 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Nov 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetoresistive transducer showing a giant magnetoresistance effect has a multi-layer structure including first and second ferromagnetic layers separated by a non-magnetic layer. The second ferromagnetic layer has a magnetization pinned in a direction perpendicular to a direction of a signal magnetic field. An anti-ferromagnetic layer adjacent to the second ferromagnetic layer pins magnetization of the second ferromagnetic layer in a direction perpendicular to a direction of a signal magnetic field so that magnetizations of the first and second ferromagnetic layers have components perpendicular to the signal magnetic field and those components are anti-parallel to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.