Self-biased dual spin valve sensor

Dynamic magnetic information storage or retrieval – Head – Hall effect

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G11B 539

Patent

active

057680698

ABSTRACT:
A dual spin valve (DSV) magnetoresistive (MR) sensor has a free magnetic layer disposed between first and second pinned magnetic layers. The first pinned layer has two magnetic sublayers separated from each other by an antiparallel spacer. The first magnetic sublayer closer to the free layer has a magnetic moment which is smaller than the magnetic moment of the second magnetic sublayer. The net moment of the magnetic sublayers is chosen to be equal to the magnetic moment of the second pinned layer thus creating a flux closure and substantially minimizing the effect of the demagnetizing forces. By creating a flux closure and current induced magnetic fields, the first and second pinned layers' magnetization are fixed. This is in contrast with conventional dual spin valve sensors using two antiferromagnetic layers to pin the magnetization of the pinned layers.

REFERENCES:
patent: 5287238 (1994-02-01), Baumgart et al.
patent: 5301079 (1994-04-01), Cain et al.
patent: 5442508 (1995-08-01), Smith
patent: 5465185 (1995-11-01), Heim et al.
patent: 5508867 (1996-04-01), Cain et al.
patent: 5576915 (1996-11-01), Akiyama et al.
patent: 5583725 (1996-12-01), Coffey et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Self-biased dual spin valve sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-biased dual spin valve sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-biased dual spin valve sensor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1732878

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.