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Total angular momentum and atomic magnetic moments

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Total angular momentum and atomic magnetic moments

Auteurs : Xavier Oudet [France] ; Georges Lochak [France]

Source :

RBID : ISTEX:A7185B4081B7641C0E08613A0A52CBAAD66D989F

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English descriptors

Abstract

Abstract: A new calculation of the magnetic moment of an atom is suggested on the basis of the hypothesis that the total angular momentum of one electron is the same in a complex atom situated in a solid as in a hydrogen-like atom described in Dirac's theory. The latter is first revisited and the quantum states thus defined are compared with those of Schrödinger's theory. Then, the experimental basis of the notion of spin is recalled and compared to the subshell division of the p, d and f shells in Dirac's theory.Using this division in subshells a calculation of the magnetic moment is applied to the heavy rare earth metals, iron, cobalt, nickel and the chromium compounds and compared with experimental data. This leads us to a discussion of the Pauli exclusion principle and to the choice of a convenient electronic configuration of each magnetic element. Finally these configurations are compared to the theoretical magnetic moments.

Url:
DOI: 10.1016/0304-8853(87)90315-5

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ISTEX:A7185B4081B7641C0E08613A0A52CBAAD66D989F

Le document en format XML

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<div type="abstract" xml:lang="en">Abstract: A new calculation of the magnetic moment of an atom is suggested on the basis of the hypothesis that the total angular momentum of one electron is the same in a complex atom situated in a solid as in a hydrogen-like atom described in Dirac's theory. The latter is first revisited and the quantum states thus defined are compared with those of Schrödinger's theory. Then, the experimental basis of the notion of spin is recalled and compared to the subshell division of the p, d and f shells in Dirac's theory.Using this division in subshells a calculation of the magnetic moment is applied to the heavy rare earth metals, iron, cobalt, nickel and the chromium compounds and compared with experimental data. This leads us to a discussion of the Pauli exclusion principle and to the choice of a convenient electronic configuration of each magnetic element. Finally these configurations are compared to the theoretical magnetic moments.</div>
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