26.5 Gb/in/sup 2/ areal-density longitudinal thin film media

A 26.5 Gb/in/sup 2/ areal-density demonstration was made using low-noise, thermally stable media and advanced dual-spin-valve heads. The demonstration was achieved at a linear density of 504 kbpi, a track density of 52.6 ktpi, and a data transfer rate of 230 Mb/s. The media had M/sub r/t of 0.40 mem...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2000-09, Vol.36 (5), p.2143-2147
Main Authors: Schultz, M.A., Malhotra, S.S., Lal, B.B., Kimmal, J.M., Russak, M.A., Liu, F., Stoev, K., Shi, S., Hua-Ching Tong, Dey, S.
Format: Article
Language:English
Subjects:
Coercive force
Magnetic films
Magnetic heads
Magnetic properties
Magnetic susceptibility
Magnetization
Signal to noise ratio
Thermal stability
Transistors
Viscosity
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Summary:A 26.5 Gb/in/sup 2/ areal-density demonstration was made using low-noise, thermally stable media and advanced dual-spin-valve heads. The demonstration was achieved at a linear density of 504 kbpi, a track density of 52.6 ktpi, and a data transfer rate of 230 Mb/s. The media had M/sub r/t of 0.40 memu/cm/sup 2/ and coercivity of 2500 Oe, and were composed of a dual-magnetic-layer structure with a five-element magnetic alloy. It was observed that smaller, uniform and isolated magnetic grains are critical to reducing the media noise and for designing ultra-high areal-density recording media that are thermally stable.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.908335