Restoring the magnetic-flux of a magnet

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Restoring the magnetic flux of a horseshoe magnet that has lost its magnetism can be challenging, especially if it was improperly demagnetized instead of remagnetized. A keeper plate is essential after remagnetization to maintain the magnet's strength. Users are seeking reliable sources or methods for effectively remagnetizing their magnets. The specific dimensions of the magnet are noted, which may influence the choice of remagnetization techniques. Finding a professional service or using a strong external magnetic field are potential solutions for restoring the magnet's properties.
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How do you go about restoring the magnetic-flux of a horseshoe magnet that has lost all its' magnetic-flux? The magnet was originally weak and was sent to a company to have the magnetisim restored and when returned, all magnetic-flux was gone, as if it had been degaussed.
 
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They demagnetized it instead of remagnetized it.

It needs to have a keeper plate on it after being remangetized.
 
Thankyou for the information. What source is there for remagnitizing a magent? The horseshoe magnet measures 2 3/4" H X 2 1/2" W X 1" X 3/8" thick.
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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Thread 'Why measure the speed of light in one direction?'

It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
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