Neutron magnetic form factors of uranium ions

Arthur J Freeman, J. P. Desclaux, G. H. Lander, J. Faber

Research output: Contribution to journalArticle

140 Citations (Scopus)

Abstract

The radial ji integrals, which contribute to the neutron magnetic form factors, of several uranium ions (U3+, U4+, U5+) are determined from fully relativistic Dirac-Fock wave functions. The expectation values of the rn operators, rn, with n=-3, 2, 4, and 6 are given for the uranium ions. The possibility of determining the ionization state by magnetic scattering experiments is discussed. The radial ji integrals are used to analyze the experimental form factor of US determined by Wedgwood. Satisfactory agreement is found by choosing a 5f2 Γ1 crystal-field ground state with a large internal exchange field inducing ferromagnetism. Contributions to the magnetic scattering from 6 d electrons are found to be negligible for values of sinθλ>0.2 -1.

Original languageEnglish
Pages (from-to)1168-1176
Number of pages9
JournalPhysical Review B
Volume13
Issue number3
DOIs
Publication statusPublished - 1976

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Uranium
uranium
form factors
Neutrons
Scattering
Ions
neutrons
Ferromagnetism
Wave functions
scattering
Ground state
ferromagnetism
crystal field theory
Ionization
ions
wave functions
ionization
operators
Crystals
ground state

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Neutron magnetic form factors of uranium ions. / Freeman, Arthur J; Desclaux, J. P.; Lander, G. H.; Faber, J.

In: Physical Review B, Vol. 13, No. 3, 1976, p. 1168-1176.

Research output: Contribution to journalArticle

Freeman, AJ, Desclaux, JP, Lander, GH & Faber, J 1976, 'Neutron magnetic form factors of uranium ions', Physical Review B, vol. 13, no. 3, pp. 1168-1176. https://doi.org/10.1103/PhysRevB.13.1168
Freeman, Arthur J ; Desclaux, J. P. ; Lander, G. H. ; Faber, J. / Neutron magnetic form factors of uranium ions. In: Physical Review B. 1976 ; Vol. 13, No. 3. pp. 1168-1176.
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