Electronic Factors Influencing the Local and Cooperative Jahn-Teller Interactions in Spinels with Copper(II) and Nickel(II)

M. Atanasov, U. Kesper, B. L. Ramakrishna, D. Reinen

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Optical spectra and structural data of mixed crystals CuxZn1-xCr2O4, NixZn1-xCr2O4, and Cu1-xNixCr2O4 are reported. The optical results are used as a probe characterizing the d -contributions to the Cu-O bonds. The cooperative Jahn-Teller forces are analyzed, extending the statistical model by Wojtowicz to the tetrahedral sublattice. Thermodynamical and optical data are used to estimate the corresponding cooperative strain energies. A microscopic bonding model is proposed which is based on the bonding properties of the oxygen ligands with respect to Cu2+ due to the presence of the "contrapolarizing" Cr3+ cations. This concept makes it possible to understand the enhancement of the local Jahn-Teller distortions with increasing cooperativeness.

Original languageEnglish (US)
Pages (from-to)1-18
Number of pages18
JournalJournal of Solid State Chemistry
Volume105
Issue number1
DOIs
StatePublished - Jul 1993

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Nickel
Copper
nickel
Jahn-Teller effect
copper
mixed crystals
Strain energy
electronics
sublattices
Cations
optical spectrum
Positive ions
Ligands
interactions
Oxygen
cations
Crystals
ligands
augmentation
probes

ASJC Scopus subject areas

  • Materials Chemistry
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Electronic Factors Influencing the Local and Cooperative Jahn-Teller Interactions in Spinels with Copper(II) and Nickel(II). / Atanasov, M.; Kesper, U.; Ramakrishna, B. L.; Reinen, D.

In: Journal of Solid State Chemistry, Vol. 105, No. 1, 07.1993, p. 1-18.

Research output: Contribution to journalArticle

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