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Barium ferrite tape for DAT magnetic contact duplication

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4 Author(s)
Suzuki, T. ; Toshiba Recording Media Div., Kawasaki, Japan ; Ito, T. ; Isshiki, M. ; Saito, N.

The coercivity and perpendicular orientation effects on duplication performance for the Ba-ferrite slave tape are studied by means of a DAT (digital audio tape) performance measurement on DAT recorders and anhysteretic magnetization process measurement for the slave tapes. Environmental stability for the duplicated Ba-ferrite tapes is also described. It is shown that perpendicularly oriented Ba-ferrite slave tapes, with relatively low coercivity values of around 600-700 Oe, enable a high-speed magnetic contact duplication of 76 kFRPI DAT signals to be practical. A sufficiently low error rate and high environmental stability are demonstrated for the Ba-ferrite tapes. The magnetization mechanism involved in the duplication process is analyzed in terms of anhysteretic remanent magnetization

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Magnetics, IEEE Transactions on  (Volume:25 ,  Issue: 5 )