Corrosion-Resistant GMR Head for Over 1-TB Tape System

We have developed a corrosion-resistant giant magnetoresistance (GMR) head using a spin-valve (Ta/NiFe/CoNiFe/CuAu/CoNiFe/PtMn/Ta) film for an over 1-TB helical tape system. The magnetic properties of the corrosion-resistant GMR head were preserved during a Battelle Class II test for 20 days. The se...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 42; no. 10; pp. 2321 - 2323
Main Authors Sekine, M., Watanabe, T., Tamakawa, Y., Shibata, T., Soda, Y.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.10.2006
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Applied sciences
Cassettes
Conductivity
Copper base alloys
Copper compounds
Corrosion
Corrosion environments
Corrosion resistance
Corrosion-resistant spin-valve
Cross-disciplinary physics: materials science; rheology
Density
Exact sciences and technology
Gases
Giant magnetoresistance
GMR head
Gold compounds
helical-scan tape system
Information storage
Intermetallics
Magnetic field measurement
Magnetic films
Magnetic heads
Magnetism
Materials science
ME tape
Metals. Metallurgy
Other topics in materials science
Physics
Product development
Semiconductor films
Tantalum
Tape drives
Testing
Voltage
GMR head
Proceedings
helical-scan tape system
Corrosion
Corrosion-resistant spin-valve
Valves
ME tape
Magnetic properties
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Summary:We have developed a corrosion-resistant giant magnetoresistance (GMR) head using a spin-valve (Ta/NiFe/CoNiFe/CuAu/CoNiFe/PtMn/Ta) film for an over 1-TB helical tape system. The magnetic properties of the corrosion-resistant GMR head were preserved during a Battelle Class II test for 20 days. The sense current shunting in the spacer layer of the spin-valve film (SV) was less for CuAu than for Cu due to the higher resistivity of CuAu. The interlayer-coupling field in the corrosion-resistant SV film was about 25% that in conventional SV films. Therefore, each layer of the corrosion-resistant SV film was designed so as to optimize the bias point. For stripe-heights in the range from 0.7 to 0.4 mum, the asymmetry of the head output was maintained at plusmn20%. The recording characteristics had a signal-to-noise ratio (SNR) of 19.5 dB with a 0.7 mum track width at a 254 kFCI linear density. Using this head, a tape system of over 1 TB per cassette is possible
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.878814