Magnetic Dipole - External Magnetic Field Produced By A Magnetic Dipole Moment

External Magnetic Field Produced By A Magnetic Dipole Moment

In classical physics, the magnetic field of a dipole is calculated as the limit of either a current loop or a pair of charges as the source shrinks to a point while keeping the magnetic moment m constant. For the current loop, this limit is most easily derived for the vector potential. Outside of the source region, this potential is (in SI units)

and the magnetic flux density (strength of the B-field) in teslas is

Alternatively one can obtain the scalar potential first from the magnetic pole limit,

and hence the magnetic field strength (or strength of the H-field) in ampere-turns per meter is

The magnetic field is symmetric under rotations about the axis of the magnetic moment.

Read more about this topic:  Magnetic Dipole

Other articles related to "magnetic dipole moment, magnetic, produced":

Magnetic Moment - Magnetic Dipoles - External Magnetic Field Produced By A Magnetic Dipole Moment
... Any system possessing a net magnetic dipole moment m will produce a dipolar magnetic field (described below) in the space surrounding the system ... While the net magnetic field produced by the system can also have higher-order multipole components, those will drop off with distance more rapidly, so that only the dipolar component ... The vector potential of magnetic field produced by magnetic moment m is and magnetic flux density is Alternatively one can obtain the scalar potential first ...

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