Discussion in 'Physics' started by Michael Lin, Sep 23, 2005.

  1. Michael Lin

    Thread Starter Member

    Sep 20, 2005
    I have a question about electromagnetism that I can't find a solution to from the web. Is the magnetic permeability of a material in anyway related to the magnetic dipole moment of the material? The use of the same symbol μ really confuses me. They obviously can't be the same number since they one is dimensionless and one has specific units. Please let me know if there is a simple relationship between them.

  2. Brandon

    Senior Member

    Dec 14, 2004
    There may be a relationship but the 2 values are very different. Don't forget that you have a permeability in a perfect vacuum, but its not like you can have a dipole moment in a vacuum, no one is there.
  3. Dave

    Retired Moderator

    Nov 17, 2003

    I have posted a link above to HyperPhysics who provide an explaination of Magnetic Dipole Moment as a result of a current carrying loop. Firstly, the two values permeability (μ) and magnetic moment (μ) are completely individual values. However, there will be a connection between the two since the torque of a current loop is dependant on the magnetic field B. Therefore there is a connection between the permeabilty (of free space) and the magnetic dipole moment, even though there is no direction connection between the two (that I know of).