Invention Grant
- Patent Title: CPP giant magnetoresistive head having antiferromagnetic film disposed in rear of element
- Patent Title (中): CPP巨磁阻头具有设置在元件后部的反铁磁膜
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Application No.: US10823484Application Date: 2004-04-13
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Publication No.: US07220499B2Publication Date: 2007-05-22
- Inventor: Masamichi Saito , Yoshihiro Nishiyama , Yosuke Ide , Eiji Umetsu , Naoya Hasegawa , Yasuo Hayakawa
- Applicant: Masamichi Saito , Yoshihiro Nishiyama , Yosuke Ide , Eiji Umetsu , Naoya Hasegawa , Yasuo Hayakawa
- Applicant Address: JP Tokyo
- Assignee: Alps Electric Co., Ltd.
- Current Assignee: Alps Electric Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Brinks Hofer Gilson & Lione
- Priority: JP2003-114189 20030418; JP2003-195159 20030710; JP2004/047756 20040224
- Main IPC: G11B5/127
- IPC: G11B5/127

Abstract:
A CPP giant magnetoresistive head includes lower and upper shield layers with a predetermined distance therebetween, and a giant magnetoresistive element (GMR) including pinned and free magnetic layers disposed between the upper and lower shield layers with a nonmagnetic layer interposed between the pinned and free magnetic layers. A current flows perpendicularly to the film plane of the GMR. The magnetoresistive head further includes an antiferromagnetic layer (an insulating AF of Ni—O or α-Fe2O3) provided in the rear of the GMR in a height direction to make contact with the upper or lower surface of a rear portion of the pinned magnetic layer which extends in the height direction, and an exchange coupling magnetic field is produced at the interface with the upper or lower surface, so that the magnetization direction of the pinned magnetic layer is pinned by the exchange coupling magnetic field in the height direction.
Public/Granted literature
- US20040207962A1 CPP giant magnetoresistive head having antiferromagnetic film disposed in rear of element Public/Granted day:2004-10-21
Information query
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