Covalent effects in rare-earth crystal-field splittings

R. E. Watson, Arthur J Freeman

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Covalent contributions to the optical splitting of rare-earth ions are discussed. Tm2+ in CaF2, the system studied by Bleaney, Axe, and Burns, and others, was chosen because it is an outstanding example of the breakdown of the traditional electrostatic theory when applied to rare-earth ions in cubic environments. Upon separating out overlap from covalent contributions, overlap effects are found to dominate. The role of the closed 5p shell in covalent mixing is shown to be as important as, or more important than, that due to the 4f shell alone.

Original languageEnglish
Pages (from-to)251-258
Number of pages8
JournalPhysical Review
Volume156
Issue number2
DOIs
Publication statusPublished - 1967

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crystal field theory
rare earth elements
ions
breakdown
electrostatics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Covalent effects in rare-earth crystal-field splittings. / Watson, R. E.; Freeman, Arthur J.

In: Physical Review, Vol. 156, No. 2, 1967, p. 251-258.

Research output: Contribution to journalArticle

Watson, R. E. ; Freeman, Arthur J. / Covalent effects in rare-earth crystal-field splittings. In: Physical Review. 1967 ; Vol. 156, No. 2. pp. 251-258.
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