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Looking for image theory regarding magnetic elements.

  1. Jun 4, 2013 #1
    Question on Perfect Magnetic conductor.

    Are PMC always metal compound like Iron etc. That has high ##\mu##? So most of good magnetic conductor are themselves electric conductor?

    From articles I read:

    PEC ##\Rightarrow\;\hat n \times \vec E=0\;\hbox{ and }\;\hat n\times \vec H=\vec J##.
    PMC ##\Rightarrow\;\hat n \times \vec H=0\;\hbox{ and }\;\hat n\times \vec E=-\vec M##.

    Is there anything else?

    Thanks
     
    Last edited: Jun 4, 2013
  2. jcsd
  3. Jun 4, 2013 #2
    High magnetic permeability does not imply good electrical conductivity. Magnetic core material that has high electrical resistivity is very desirable for high frequency transformers. Nickel zinc ferrites are an example, essentially insulators with resistivity > 10^5. The high resistivity prevents eddy current losses from spoiling high frequency operation.
     
  4. Jun 4, 2013 #3
    Thanks for the response. Yes, I understand there are material that are good magnetic conductor but not electric conductor. But there are quite a few that is both.
     
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