Magnetic behavior of ferromagnetic materials

Discussion in 'Physics' started by i_nour, Feb 20, 2016.

  1. i_nour

    Thread Starter New Member

    Nov 9, 2015
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    Why do ferromagnets have varying permeabilities?
     
  2. profbuxton

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    Feb 21, 2014
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    Different molecular composition!
     
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  3. Glenn Holland

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    Dec 26, 2014
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    Depends on the magnetic moment of the individual atoms in the ferromagnetic material.

    Silicon-iron or steel is a common ferromagnetic material with the one of the highest permeabilities and it's used in transformers and motors.
     
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  4. BR-549

    Well-Known Member

    Sep 22, 2013
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    Because of the strength of the magnetic field, the ferromagnetic object was under, when it cooled from a molten state to a solid state.
     
  5. profbuxton

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    Feb 21, 2014
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    As I said. Different molecular composition.. it has nothing to do with cooling in an applied magnetic field. That can be used to make magnets. But in reality most permanent magnets are made by applying a very strong magnetic field to suitable magnetic material via a high discharge current through a coil. The high remanence of the material ensures it retains the induced magnetism
     
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  6. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    Transformer and electric motor stator steels are not used in there "as melted" states. Doubtful that any ferrous metal is left in the as melted state. Transformer and stator steel goes through many different heat treating steps before being used.
     
  7. wayneh

    Expert

    Sep 9, 2010
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    But the question as posed was regarding magnets, not transformer steel. It's hard to guess what the TS was really asking.
     
  8. shortbus

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    And I was answering BR549 and Glen Holland.
     
  9. recklessrog

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    May 23, 2013
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    Last edited: Mar 17, 2016
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