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

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 will dominate the magnetic field of the system at distances far away from it.

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 from the magnetic pole perspective,

and hence magnetic field strength is

The magnetic field of an ideal magnetic dipole is depicted on the left.

Read more about this topic:  Magnetic Moment, Magnetic Dipoles

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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 ... 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 ...

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