Re the seagate news, I find it interesting..we need some of the experts to weigh in on this...
Anyway, here are some cut and pastes which put together are intriguing...
From Seagate' press release..."The data bits were recorded onto Seagate
produced magnetic thin-film, low-noise, ultra-smooth cobalt alloy media. The
head was at a fly height of 15 nanometers -- 100th the diameter of a fine silk
thread....."
From the one of the recent Ampex patents on KM....."In an illustrative embodiment, the keeper layer is formed of a relatively thin layer of a soft magnetic material having a relatively high coercivity and low permeability, which saturates at a relatively low bias flux level, but cannot be saturated by flux from the magnetic storage layer alone. In general, the soft magnetic material may be any permeable alloy, and suitable materials include permalloy, sendust and super sendust.
The magnetic storage medium is independent of the type of head transducer employed in the magnetic storage system. For example, the present invention may operate with ferrite, thin-film or magnetoresistive heads, including giant MR heads............"
From research.....
"http://www.ee.umn.edu/users/jchen/publ.html
Experimental Study of Recording Performance of Sendust and CoZrNb Keepered Thin Film Media
Jinghuan Chen, Jack H. Judy etc., MINT, University of Minnesota
Thomas Coughlin, Ampex Corp.
IEEE Transactions on Magnetics, Vol 33, No. 5, P3040 ,,,,""
Co is Cobalt ....
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