Giant magnetoresistive material film which includes a free layer, a pinned layer and a coercive force increasing layer
US5742458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Apr 3, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A giant magnetoresistive material film includes at least two ferromagnetic layers of a NiFe alloy or NiFeCo alloy, which are formed on a substrate through a nonmagnetic layer of Au, Ag, Cu or Cr, wherein magnetization of at lest one of the ferromagnetic layers is pinned by a coercive force increasing layer of .alpha.-Fe.sub.2 O.sub.3 provided adjacent thereto and having a thickness of 200 to 1000 .ANG. so as to increase coercive force of the ferromagnetic layer, and the other ferromagnetic layer has free magnetization so as to produce a change in resistance at a low magnetic field. The present invention also provides a method of producing the giant magnetoresistive material film and a magnetic head provided with the giant magnetoresistive material film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.