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Electric potential energy

  1. Dec 7, 2012 #1
    my professor has explained Electric potential energy Law U=∫D*E above all the space. he said you can not use for some kind of materials. l can 't remember if they are Ferroelectricity or piezoelectric materials. then can you say to me the reason too? thank you
     
  2. jcsd
  3. Dec 7, 2012 #2
    I'm guessing he might have been alluding to the hysteresis effect of ferromagentic materials.
    more here:http://en.wikipedia.org/wiki/Ferroelectricity
     
  4. Dec 7, 2012 #3
    There is a hysteresis effect in ferroelectric materials, too.
     
  5. Dec 7, 2012 #4
    but why couldn't l use for the ferroelectricity materials
     
  6. Dec 8, 2012 #5

    Meir Achuz

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    The derivation of the D.E form requires that the relation between D and E be linear.
    It is not for ferroelectric materials.
     
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