Magnetoresistive head and perpendicular magnetic recording-reproducing apparatus
US6847509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2002 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Jan 31, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetoresistive head has a magnetoresistive film including first and second magnetization free layers, an intermediate layer sandwiched between the first and second magnetization free layers, an underlayer and a protective layer, which are stacked in the order of the underlayer, the first magnetization free layer, the intermediate layer, the second magnetization free layer and the protective layer and arranged to be substantially perpendicular to the air-bearing surface, and a first electrode connected with the underlayer and a second electrode connected with the protective layer, the electrodes allowing a current to flow in a direction substantially perpendicular to the plane. Each magnetization direction of the first and second magnetization free layers is allowed to vary independently in response to a signal magnetic flux from a medium. The first and second magnetization free layers produce a magnetoresistance effect in accordance with the magnetization directions thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.