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Permanent magnet storage.

  1. Jun 3, 2007 #1
    I guess I do have to ask some questions on magnet storage. Especially over long periods of time. Basically, I want to know what the effects are if you store (relatively strong) magnets north to south with a slight gap in between (roughly 50mm between).

    N===S N===S N===S

    That's pretty much the best crude ascii drawing I can do. Anywho, if there is an effect, what would it be relative to time and to distance apart?
  2. jcsd
  3. Jun 3, 2007 #2

    Meir Achuz

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    That arrangement would tend to preserve the magnetization.
    It would be better if they touched. 5 cm seems like too much.
    The preserving effect depends on d^2/A(area). If this is not<<1, the effect would tend to fall off as 1/d^2.
    The time dependence depends on temperature and the particular characteristics of the magnetic material.
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