An electron spin resonance study of vanadium-doped alpha -TeO2 single crystals

G. J. Edwards, O. R. Gilliam, R. H. Bartram, A. Watterich, R. Voszka, J. R. Niklas, S. Greulich-Weber, J. M. Spaeth

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Abstract

An ESR study of vanadium-doped paratellurite indicates that vanadium enters the lattice as V4+, equally populating the four inequivalent cation sites. The 3d1 electron exhibits hyperfine interaction with the I=7/2 51V nucleus and superhyperfine interaction with two neighbouring I= 1/2 nuclei identified as protons by ENDOR experiments. Spin Hamiltonian parameters computed from ESR measurements show that each V4+ ion has a single C2 symmetry axis along one of the (110) directions. The neighbouring hydrogens appear to enhance the symmetry and stability of the defect structure. Group theoretical arguments show that there are two possible linear combinations of d wavefunctions that could represent the ground state of V4+ in alpha -TeO2. However, a determination of the lower-lying state was not feasible using only the ESR data.

Original languageEnglish
Article number008
Pages (from-to)3013-3022
Number of pages10
JournalJournal of Physics: Condensed Matter
Volume7
Issue number15
DOIs
Publication statusPublished - Dec 1 1995

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Edwards, G. J., Gilliam, O. R., Bartram, R. H., Watterich, A., Voszka, R., Niklas, J. R., Greulich-Weber, S., & Spaeth, J. M. (1995). An electron spin resonance study of vanadium-doped alpha -TeO2 single crystals. Journal of Physics: Condensed Matter, 7(15), 3013-3022. [008]. https://doi.org/10.1088/0953-8984/7/15/008