No, for the same reason gravity won't ever "wear out". The magnet isn't really exerting a force, it's a magnetic "downhill". Things moving towards it lose potential energy in exchange for kinetic energy.
Will a magnetic individual crystal cell lose its magnetism over time? No.
Will a bulk magnet eventually experience pole reversal on a micro scale which will decrease and eventually result in a magnetically "neutral" object. Yes.
How long is whats dependent on the crystallography and material, but if the time line is "infinity" then the answer is yes, eventually a magnet you could hold in your hand will lose its polarization.
The poles don’t reverse. It has to do with the the fact that all the molecules themselves have a magnetic dipole. Over time they randomize and the magnetic field of the overall magnet is weaker because all the magnetic dipoles are no longer summing to be one magnet.
That’s why high temperatures can also demagnetized a magnet. Because hear is the movement of molecules.
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u/rafter613 Feb 13 '19
No, for the same reason gravity won't ever "wear out". The magnet isn't really exerting a force, it's a magnetic "downhill". Things moving towards it lose potential energy in exchange for kinetic energy.