Giant magnetoresistive material film, method of producing the same magnetic head using the same
US6340520B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1998 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Apr 2, 2018 |
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 &agr;-Fe2O3 provided adjacent thereto and having a thickness of 200 to 1000 å 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.