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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 ...
This is the basis for defining the magnetic moment units of Bohr magneton (assuming charge-to-mass ratio of the electron) and nuclear magneton (assuming charge-to-mass ratio of the proton). See electron magnetic moment and Bohr magneton for more details.
The volume magnetic susceptibility, represented by the symbol is defined by the relationship M → = χ v H → {\displaystyle {\vec {M}}=\chi _{v}{\vec {H}}} where, M → {\displaystyle {\vec {M}}} is the magnetization of the material (the magnetic dipole moment per unit volume), measured in amperes per meter ( SI units), and H → ...
The factor of two indicates that the electron appears to be twice as effective in producing a magnetic moment as a charged body for which the mass and charge distributions are identical. The spin magnetic dipole moment is approximately one μ B because g s ≈ 2 {\displaystyle g_{\text{s}}\approx 2} and the electron is a spin- 1 / 2 ...
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.
Written in terms of the Bohr magneton, this gives: =. Recognizing that m e v is the electron momentum, p , and that r × p / ħ is the orbital angular momentum in units of ħ , ℓ , we can write: B el ℓ = − 2 μ B μ 0 4 π 1 r 3 ℓ . {\displaystyle \mathbf {B} _{\text{el}}^{\ell }=-2\mu _{\text{B}}{\frac {\mu _{0}}{4\pi }}{\frac {1}{r^{3 ...
Bohr magneton: 9.274 010 0657 (29) × 10 ... While the values of the physical constants are independent of the system of units in use, each uncertainty as stated ...
The magnetic dipole moment of the electron, which is much larger as a consequence of much larger charge-to-mass ratio, is usually expressed in units of the Bohr magneton, which is calculated in the same fashion using the electron mass. The result is larger than μ N by a factor equal to the proton-to-electron mass ratio, about 1836.