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[AV Media Matters] Pixie Dust
Hard Disk Drives:
About a year ago, I posted a piece about IBM's use of "Pixie Dust" to
increase the density of HDDs to 400 GB per disk. They did this by
adding Ruthenium
to the magnetic coating. Ruthenium seperates the magnetic particle so
that
they have less affect on each other when tightly packed together. As
Peter
Brothers pointed out, this is called "Super-paramagnetism".
The Center for Magnetic Recording Research at University of
California--San
Diego (CMMR) has done some work on the problem of super-paramagnetism
but they
need funding to continue their research. www.cmrr.ucsd.edu
Jim Wheeler
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