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:
-
- San Carlos, CA
- Fremont, CA
- San Jose, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (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)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
G - PHYSICS G11 - INFORMATION STORAGE G11B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- 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}
}
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