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physics!  Browse our 6407 answers by or search term  Hi mike, i
have a few questions and it seems you know what your talking
about with magnets, superconducters and tempurature. Although
alittle seperate from your original topic, I am wondering if a
Neodymium magnet would become less effective at supercooled
tempurature, using liquid nitrogen and/or liquid helium ... and
if Niobium tin (Which will work around 4.2Kelen)/Noibium
titianium would work as a superconducting magnet cooled by
Liquid Nitrogen (77K) in conjunction with liquid helium
(2.17K)... if you need me to refraze this i can. - Brennan (age
20) Hayward, CA, USA Brennan- If this doesn't quite get to what
you're asking, try a follow-up.  Those neodynium magnets should
work fine when they're cold. Don't cool them too quickly, since
I worry that they might break under thermal strain. So far as I
know, they won't crack if the tempe