Demagnetizing field

  1. Can anybody enlighten me on what demagnetizing field is and how it comes to existence?
     
  2. jcsd
  3. clem

    clem 1,276
    Science Advisor

    Chegg
    At the end of a bar magnet, H points in the opposite direction to M and B. This is due to the boundary condition on H at the end of a magnet. In many books, this is called a
    "demagnetizing field". That is a misnomer, because it is B and not H that acts to polarize the atoms in the iron. Since B near the end of the magnet is 1/2 its value at the middle, there is some tendency for the magnet to lose a bit of its magnetization (M) over time.
     
  4. I'll try to absorb what you said, and then come back.
    Thanks for your post
     
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