Abstract
The key technique in applying keepered media system in a reproduction is how to open the keeper layer. In this paper we propose a new concept of keepered-media-reproduction with Dual Magnetoresistive (DMR) heads. The keeper layer may be biased by the stray flux from DMR sensors, The shunting-releasing ratio between reproduced signals without and with a sense current is found to be -26 dB. This media system is completely stable 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/in/sup 2/ areal density barrier with the aid of the high performance gains of MR heads.
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