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Title: Read/write head having a GMR sensor biased by permanent magnets located between the GMR and the pole shields

Abstract

A compact read/write head having a biased giant magnetoresistive sensor. Permanent magnet films are placed adjacent to the giant magnetoresistive sensor operating in the current-perpendicular-to the-plane (Cpp) mode and spaced with respect to the sensor by conducting films. These permanent magnet films provide a magnetic bias. The bias field is substantial and fairly uniform across sensor height. Biasing of the giant magnetoresistive sensor provides distinguishable response to the rising and falling edges of a recorded pulse on an adjacent recording medium, improves the linearity of the response, and helps to reduce noise. This read/write head is much simpler to fabricate and pattern and provides an enhanced uniformity of the bias field throughout the sensor.

Inventors:
 [1];  [2];  [3]
  1. (San Carlos, CA)
  2. (Fremont, CA)
  3. (San Jose, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
872201
Patent Number(s):
5883763
Assignee:
Read-Rite Corporation (Milpitas, CA); Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
write; head; gmr; sensor; biased; permanent; magnets; located; pole; shields; compact; giant; magnetoresistive; magnet; films; placed; adjacent; operating; current-perpendicular-to; the-plane; cpp; mode; spaced; respect; conducting; provide; magnetic; bias; field; substantial; fairly; uniform; height; biasing; provides; distinguishable; response; rising; falling; edges; recorded; pulse; recording; medium; improves; linearity; helps; reduce; noise; simpler; fabricate; pattern; enhanced; uniformity; throughout; magnetoresistive sensor; placed adjacent; permanent magnet; permanent magnets; giant magnetoresistive; write head; recording medium; conducting films; bias field; field throughout; conducting film; /360/

Citation Formats

Yuan, Samuel W., Rottmayer, Robert Earl, and Carey, Matthew J. Read/write head having a GMR sensor biased by permanent magnets located between the GMR and the pole shields. United States: N. p., 1999. Web.
Yuan, Samuel W., Rottmayer, Robert Earl, & Carey, Matthew J. Read/write head having a GMR sensor biased by permanent magnets located between the GMR and the pole shields. United States.
Yuan, Samuel W., Rottmayer, Robert Earl, and Carey, Matthew J. Fri . "Read/write head having a GMR sensor biased by permanent magnets located between the GMR and the pole shields". United States. https://www.osti.gov/servlets/purl/872201.
@article{osti_872201,
title = {Read/write head having a GMR sensor biased by permanent magnets located between the GMR and the pole shields},
author = {Yuan, Samuel W. and Rottmayer, Robert Earl and Carey, Matthew J.},
abstractNote = {A compact read/write head having a biased giant magnetoresistive sensor. Permanent magnet films are placed adjacent to the giant magnetoresistive sensor operating in the current-perpendicular-to the-plane (Cpp) mode and spaced with respect to the sensor by conducting films. These permanent magnet films provide a magnetic bias. The bias field is substantial and fairly uniform across sensor height. Biasing of the giant magnetoresistive sensor provides distinguishable response to the rising and falling edges of a recorded pulse on an adjacent recording medium, improves the linearity of the response, and helps to reduce noise. This read/write head is much simpler to fabricate and pattern and provides an enhanced uniformity of the bias field throughout the sensor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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