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What is the cause for diamagnetism and other types of magnetism?

  1. Dec 18, 2011 #1
    What is the cause for diamagnetism and other types of magnetism?

    Is it related to Farady's law or quantum mechanical properties of matter?
     
  2. jcsd
  3. Dec 19, 2011 #2

    Drakkith

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    Staff: Mentor

  4. Dec 19, 2011 #3
    Re: Diamagnetism-cause

    So how do identify easily that a molecule or atom is diamagnetic or paramagnetic or ferromagnetic?
     
  5. Dec 19, 2011 #4
    Re: Diamagnetism-cause

    It's actually more complex than two sentences on physics forums can do justice to the subject. Each electron has intrinsic angular momentum (spin) which gives rise to a magnetic dipole moment, and orbital angular momentum depending on what state it is in inside the atom, which also gives rise to a magnetic moment. Add up all the magnetic effects of all the electrons in an atom and you can get a total magnetic moment. But you also have to take into consideration how the atoms bond with each to form a solid, because will effect their magnetic dipole's ability to respond to an applied field. Also, in responding to an applied magnetic field, the electron states change, which change their magnetic properties.
     
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