* "Brett Tyre" <[EMAIL PROTECTED]> on Tue, 18 Apr 2000
| Correct me if I'm wrong, but isn't an MD encoded optically?
Magnetio-optical media like MD is composed of nominally non-magnetic
metallic layer bonded to an inert substrate. When recording, the MD laser
(the optical part of MO) heats a spot of the metallic layer to the curie
point -- the temperature at which a non-magnetic metal acquires magnetic
properties. Then the read/write (the magnetic part of MO) head hits that
spot with a magnetic field aligned in one direction for "0" and another for
"1". When the spot cools it loses its magnetic properties.
--
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