I have 10 cylindrical neodymium permanent magnets about 5mm in diameter, 5 mm long, embedded in a thermoplastic polymer. I want to demagnetize them without removing them, or heating them above 60 C - they must remain motionless, +/- 1 mm.
Note that the magnets are NOT all aligned in the same direction.
I can move a demagnetizer within 5 inches of the assembly, or place the entire (1m x .3m x .2m) assembly within a demagnetizer.
Yes - I thought about melting the plastic and replacing them - but all the other stuff must stay invariant :(