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Magnetic moment

  1. Sep 11, 2009 #1
    hi im student of graduate and want to clear the picture of MAGNETIC MOMENT of electron in my mind.can someone tell me that if an electron is moving in its orbit constituting its intrinsic spin(1/2) ho can it forms dipole moment(to poles) when place in magnetic field?and what is the difference between magnetic dipole moment of electron and magnetic dipole moment of nucleus?how can we seperate these two as atom contains both?
  2. jcsd
  3. Sep 11, 2009 #2


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    Well, it's got a charge, and it's 'rotating'. We know spin isn't actually the particle rotating on its own axis, but in many contexts, it acts as if it did. This is one of those contexts.

    Well, they have different magnitudes. And some nuclei have zero total spin and thus no magnetic moment.

    You can't. There is a nucleus-electron magnetic coupling. (if the nucleus has spin). It's just not significant in most cases.
  4. Sep 11, 2009 #3


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    The electron spin and its magnetic moment are relativistic QM effects that do not mean the electron is rotating. The magnetic dipole of a nucleus is about 2,000 times smaller than that of an electron. The magnetic momment of a nucleus is the vector sum of the magnetic moments of its nucleons and their orbital magnetic moments. The nuclear magnetic moment can be inferred from the hyperfine splitting which comes from the magnetic dipole-dipole interaction between the nuclear moment and the electron moment (spin and orbital).
  5. Sep 11, 2009 #4
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