Journal of the Magnetics Society of Japan
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
Recording theories and characteristics
Keepered-Perpendicular-Media Reproduction with Dual MR Heads
L.N. HeZ.G. WangD.J. MappsD.T. WiltonW.W. CleggP. Robinson
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1997 Volume 21 Issue S_2_PMRC_97_2 Pages S2_273-276


  The key technique to apply keepered media system is how to ‘open‘ the keepered layer. In this paper, we would propose a new concept of keepered-media-reproduction with Dual MR heads. The keeper layer could be biased by the stray flux from DMR sensors. The shunting-releasing ratio between reproductive signals without and with sense current is found to be -26.6 dB. This is a completely-stable medium system against thermal demagnetization. It is believed that keepered media may offer a similar advantage with MR heads and potentially allow magnetics to break the 10 Gb/in2 areal density barrier due to the high performance gains of MR heads.

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© 1997 by The Magnetics Society of Japan
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