Polarized-neutron study of the coherent paramagnetic scattering amplitude of metallic erbium

C. Stassis, G. R. Kline, Arthur J Freeman, J. P. Desclaux

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Polarized-neutron techniques have been used to measure the coherent paramagnetic scattering amplitude of high-purity single crystals of metallic erbium at 300 K. The angular dependence of the coherent-scattering amplitude has been determined with the external magnetic field (H=22 kOe) applied parallel as well as perpendicular to the c axis of the crystal. It has been found that the angular dependence of the scattering amplitude for H→̂¥c→ as well as H→̂¥c→ is in good agreement, except at small scattering angles, with the 4f-electron magnetic form factor calculated using relativistic Dirac-Fock wave functions. At small scattering angles the experimental points were found to be systematically higher than the theoretical curves obtained by least-square fitting of the calculated 4f-electron form factor to the large-angle experimental points. This small-angle contribution, attributed to the polarization of the conduction bands of erbium, has an unusual angular dependence; it is different from either a 5 d or 6 s atomic form factor and exhibits a non-negative oscillatory character.

Original languageEnglish
Pages (from-to)3916-3923
Number of pages8
JournalPhysical Review B
Volume13
Issue number9
DOIs
Publication statusPublished - 1976

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Erbium
scattering amplitude
erbium
Neutrons
Scattering
form factors
neutrons
Coherent scattering
Electrons
coherent scattering
Wave functions
Conduction bands
scattering
conduction bands
purity
electrons
Single crystals
wave functions
Polarization
Magnetic fields

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Polarized-neutron study of the coherent paramagnetic scattering amplitude of metallic erbium. / Stassis, C.; Kline, G. R.; Freeman, Arthur J; Desclaux, J. P.

In: Physical Review B, Vol. 13, No. 9, 1976, p. 3916-3923.

Research output: Contribution to journalArticle

Stassis, C. ; Kline, G. R. ; Freeman, Arthur J ; Desclaux, J. P. / Polarized-neutron study of the coherent paramagnetic scattering amplitude of metallic erbium. In: Physical Review B. 1976 ; Vol. 13, No. 9. pp. 3916-3923.
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