long term magnetic repulsion with permenant magnets?


by carmatic
Tags: magnetic, magnets, permenant, repulsion, term
carmatic
carmatic is offline
#1
May10-12, 11:28 AM
P: 87
i have a set of neodynium magnets which i am using for a magnetic levitation project... will the constant exposure to an opposing magnetic field weaken the magnets over time? are 'permenant' magnets really permenant?
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Meir Achuz
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#2
May11-12, 10:37 AM
Sci Advisor
HW Helper
P: 1,937
The reverse magnetic field can tend to demagnetize. The extent depends on the material of the magnet and temperature.
carmatic
carmatic is offline
#3
May12-12, 10:31 AM
P: 87
the coercivity of neodymium is 1.2 , which is supposed to be greater than most materials... this means that , in the same conditions, neodymium would keep its magnetic strength for longer than most materials, but not indefinitely?


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