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Reverse polarities of rare earth magnets

  1. Aug 3, 2014 #1
    First time writing , hope all goes well.
    Looking to understand the properties of rare earth magnets, are you able to reverse the polarity of two magnets that are stuck together and separate them with an electromagnetic pulse or any other instrument ?

    Please if this is the wrong forum , advise me.

    Cheers
     
  2. jcsd
  3. Aug 5, 2014 #2
    I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
     
  4. Aug 8, 2014 #3

    Lok

    User Avatar

    Welcome to PF chad,

    A bit of literature:
    http://en.wikipedia.org/wiki/Magnetic_particle_inspection#Demagnetizing_parts
    http://en.wikipedia.org/wiki/Magnet#Demagnetizing_ferromagnets
    http://en.wikipedia.org/wiki/Curie_temp
    http://en.wikipedia.org/wiki/Néel_Temperature

    Reversing the polarity is quite energy intensive, and requires the application of a strong opposite field for reordering. If you wish to do that to only one magnet, the applied field will probably separate the two before you even re-magnetize the one magnet, as the field will need to be strong.
    You could use different rare earth magnets with different Curie temperatures to weaken one but the above problem still stands.
    An electromagnetic pulse or high intensity current will affect both as they are in close proximity, or will push the magnet that you do not want to reverse.

    P.S.: If this is an Free Energy Project, as magnets have a tendency to inspire this in people, please read more about the how's and why's it will never be possible.
     
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