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The Weiss magneton was experimentally derived in 1911 as a unit of magnetic moment equal to 1.53 × 10 −24 joules per tesla, which is about 20% of the Bohr magneton. In the summer of 1913, the values for the natural units of atomic angular momentum and magnetic moment were obtained by the Danish physicist Niels Bohr as a consequence of his ...
In units of the Bohr magneton (μ B), it is −1.001 159 652 180 59 (13) μ B, [2] a value that was measured with a relative accuracy of 1.3 × 10 −13. Magnetic moment of an electron [ edit ]
For example, in SI units, a loop of current with current I and area A has magnetic moment IA (see below), but in Gaussian units the magnetic moment is IA / c . Other units for measuring the magnetic dipole moment include the Bohr magneton and the nuclear magneton.
The best available measurement for the value of the magnetic moment of the neutron is μ n = −1.913 042 76 (45) μ N. [3] [4] Here, μ N is the nuclear magneton, a standard unit for the magnetic moments of nuclear components, and μ B is the Bohr magneton, both being physical constants.
The quantity μ eff is effectively dimensionless, but is often stated as in units of Bohr magneton (μ B). [ 12 ] For substances that obey the Curie law, the effective magnetic moment is independent of temperature.
This page lists examples of magnetic moments produced by various sources, grouped by orders of magnitude. The magnetic moment of an object is an intrinsic property and does not change with distance, and thus can be used to measure "how strong" a magnet is.
Bohr magneton, a physical constant of magnetic moment named after Niels Bohr; Nuclear magneton, a physical constant of magnetic moment; Parson magneton, a hypothetical object in atomic physics suggested by Alfred Lauck Parson in 1915; Weiss magneton, an experimentally derived unit of magnetic moment suggested in 1911 by Pierre-Ernest Weiss
For a magnetic crystal, it is tempting to try to define = where the limit is taken as the volume V of the system becomes large. However, because of the factor of r in the integrand, the integral has contributions from surface currents that cannot be neglected, and as a result the above equation does not lead to a bulk definition of orbital magnetization.