long term magnetic repulsion with permenant magnets?

carmatic

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?

Meir Achuz

The reverse magnetic field can tend to demagnetize. The extent depends on the material of the magnet and temperature.

carmatic

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?