What is magnetic dipole?

  • (noun): A dipole with opposing magnetic poles.

Magnetic Dipole

A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions of the source are reduced to zero while keeping the magnetic moment constant. It is a magnetic analogue of the electric dipole, but the analogy is not complete. In particular, a magnetic monopole, the magnetic analogue of an electric charge, has never been observed. Moreover, one form of magnetic dipole moment is associated with a fundamental quantum property, the spin of elementary particles.

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Some articles on magnetic dipole:

Relaxation (NMR) - Microscopic Mechanisms
... mechanism for a nucleus to change orientation with respect to the applied magnetic field and/or interchange energy with the surroundings (called the lattice) ... The most common mechanism is the magnetic dipole-dipole interaction between the magnetic moment of a nucleus and the magnetic moment of another nucleus or other entity (electro ... This interaction depends on the distance between the pair of dipoles (spins) but also on their orientation relative to the external magnetic field ...
Magnetic Dipole - Dipolar Fields From Finite Sources
... See also Near and far field The magnetic scalar potential ψ produced by a finite source, but external to it, can be represented by a multipole expansion ... Monopole moments have a 1/r rate of decrease, dipole moments have a 1/r2 rate, quadrupole moments have a 1/r3 rate, and so on ... Since the lowest-order term observed in magnetic sources is the dipolar term, it dominates at large distances ...
Magnetic Dipole–dipole Interaction
... Magnetic dipoledipole interaction, also called dipolar coupling, refers to the direct interaction between two magnetic dipoles ... is a unit vector parallel to the line joining the centers of the two dipoles ... rjk is the distance between two dipoles, mk and mj ...
Magnetic Monopole - Poles and Magnetism in Ordinary Matter
... table and every particle in the standard model—has no magnetic monopole charge ... Therefore, the ordinary phenomena of magnetism and magnets have nothing to do with magnetic monopoles ... First, electric currents create magnetic fields according to Ampère's law ...
Theory - Atomic Hyperfine Structure - Magnetic Dipole
... term in the hyperfine Hamiltonian is typically the magnetic dipole term ... There is an energy associated with a magnetic dipole moment in the presence of a magnetic field ... For a nuclear magnetic dipole moment, μI, placed in a magnetic field, B, the relevant term in the Hamiltonian is given by ...

Famous quotes containing the word magnetic:

    We are in great haste to construct a magnetic telegraph from Maine to Texas; but Maine and Texas, it may be, have nothing important to communicate.
    Henry David Thoreau (1817–1862)