Claims
- 1. A magnetoresistive head comprising:
- a soft magnetic layer for applying a linearizing bias;
- a non-magnetic layer formed on said soft magnetic layer;
- a ferro-magnetic magnetoresistance layer formed on said non-magnetic layer and having a length shorter than said non-magnetic layer;
- a pair of magnetic domain control magnetic layers formed on both sides of said ferro-magnetic magnetoresistance layer and on said non-magnetic layer, for controlling magnetic domains of said ferro-magnetic magnetoresistance layer; and
- a pair of conductive leads formed on both sides of said ferro-magnetic magnetoresistance layer, each being connected to a respective one of said pair of magnetic domain control magnetic layers;
- wherein said soft magnetic layer and said ferro-magnetic magnetoresistance layer are magnetically coupled so that the magnetization direction of said soft magnetic layer is in a direction opposite to the magnetization direction of said ferro-magnetic magnetoresistance layer.
- 2. A magnetoresistive head according to claim 1, wherein said pair of magnetic domain control magnetic layers are made of a hard magnetic layer.
- 3. A magnetoresistive head according to claim 2, wherein a product of a thickness of said pair of magnetic domain control magnetic layers and a saturation magnetic flux density thereof is larger than a product of a film thickness of said ferro-magnetic magnetoresistance layer and a saturation magnetic flux density thereof.
- 4. A magnetoresistive head according to claim 2, wherein said hard magnetic layer is formed of a cobalt-chromium-tantalum alloy, and said ferro-magnetic magnetoresistance layer is formed of an iron-nickel alloy.
- 5. A magnetoresistive head according to claim 1, wherein a length of said ferro-magnetic magnetoresistance layer is identical to a distance between said pair of conductive leads.
- 6. A magnetoresistive head according to claim 1, wherein a length of said soft magnetic layer is less than 20 .mu.m.
- 7. A magnetoresistive head according to claim 1, further comprising a substrate wherein an insulating film is formed between said soft magnetic layer and said substrate therebeneath.
- 8. A magnetoresistive head according to claim 1, wherein said pair of magnetic domain control magnetic layers are layered on said non-magnetic layer so that said non-magnetic layer separates said pair of magnetic domain control magnetic layers from said soft magnetic layer,
- wherein said soft magnetic layer is influenced through a side of each magnetic domain control magnetic layer in said pair so that a direction of magnetization in said soft magnetic layer is opposite the direction of magnetization in said pair.
- 9. A magnetoresistive head according to claim 1, wherein said opposite direction of magnetization of said soft magnetic layer occurs when said soft magnetic layer is not influenced by a sense current.
- 10. A magnetic recording apparatus comprising:
- a magnetic recording medium;
- a writing head oppositing the magnetic recording medium; and
- a magnetoresistive head oppositing the magnetic recording medium, the magnetoresistive head including:
- a soft magnetic layer for applying a linearizing bias,
- a non-magnetic layer formed on the soft magnetic layer,
- a ferro-magnetic magnetoresistance layer formed on the non-magnetic layer and having a length shorter than the non-magnetic layer,
- a pair of magnetic domain control magnetic layers formed on both sides of the ferro-magnetic magnetoresistance layer and on said non-magnetic layer, for controlling magnetic domains of the ferro-magnetic magnetoresistance layer, and
- a pair of conductive leads formed on both sides of the ferro-magnetic magnetoresistance layer, each being connected to each of the pair of magnetic domain control magnetic layers;
- wherein said soft magnetic layer and said ferro-magnetic magnetoresistance layer are magnetically coupled so that the magnetization direction of said soft magnetic layer is in a direction opposite to the magnetization direction of said ferro-magnetic magnetoresistance layer.
- 11. A magnetic recording apparatus according to claim 10, wherein said pair of magnetic domain control magnetic layers are layered on said non-magnetic layer so that said non-magnetic layer separates said pair of magnetic domain control magnetic layers from said soft magnetic layer,
- wherein said soft magnetic layer is influenced through a side of each magnetic domain control magnetic layer in said pair so that a direction of magnetization in said soft magnetic layer is opposite the direction of magnetization in said pair.
- 12. A magnetic recording apparatus according to claim 10, wherein said opposite direction of magnetization of said soft magnetic layer occurs when said soft magnetic layer is not influenced by a sense current.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-178807 |
Jul 1994 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/488,192 filed on Jun. 7, 1995, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (9)
Number |
Date |
Country |
63 117309 |
May 1988 |
JPX |
63 117310 |
May 1988 |
JPX |
63 244408 |
Oct 1988 |
JPX |
3 30109 |
Feb 1991 |
JPX |
4 298809 |
Oct 1992 |
JPX |
5 135331 |
Jun 1993 |
JPX |
5 135332 |
Jun 1993 |
JPX |
5 174334 |
Jul 1993 |
JPX |
5 217126 |
Aug 1993 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
488192 |
Jun 1995 |
|