Electron spin resonance of Cr3+ and perturbed Cr3+ centers in α-TeO2

Cr

A. Watterich, K. Raksányi, O. R. Gilliam, R. H. Bartram, L. A. Kappers, H. Söthe, J. M. Spaeth

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In an electron spin resonance study of chromium-doped paratellurite, spectra for three kinds of Cr3+-related defects have been found. The first is attributed to Cr3+ in an unperturbed Te4+ site, exhibiting C2 symmetry. The other two correspond to Cr3+ ions in perturbed tellurium sites and exhibit only C1 symmetry. For one of these, the symmetry lowering is attributed to a nearby oxygen vacancy, whereas for the other, the Cr3+ local environment is perturbed by the oxygen vacancy as well as two bridging hydrogen ions. The hydrogen ions give rise to measurable superhyperfine splittings; they are changed to trapped hydrogen atoms by an electron irradiation at 77 K. The spin-Hamiltonian parameters of the Cr3+ ions are compared with those reported for the more symmetric and more ionic rutile-type hosts.

Original languageEnglish
Pages (from-to)189-195
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume53
Issue number1
DOIs
Publication statusPublished - 1992

Fingerprint

Oxygen vacancies
Paramagnetic resonance
Protons
electron paramagnetic resonance
Tellurium
Ions
hydrogen ions
Hamiltonians
Electron irradiation
symmetry
Chromium
Hydrogen
oxygen
electron irradiation
tellurium
rutile
Atoms
Defects
chromium
hydrogen atoms

Keywords

  • Cr ions
  • ESR
  • paratellurite
  • trapped H

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Watterich, A., Raksányi, K., Gilliam, O. R., Bartram, R. H., Kappers, L. A., Söthe, H., & Spaeth, J. M. (1992). Electron spin resonance of Cr3+ and perturbed Cr3+ centers in α-TeO2: Cr. Journal of Physics and Chemistry of Solids, 53(1), 189-195. https://doi.org/10.1016/0022-3697(92)90027-B

Electron spin resonance of Cr3+ and perturbed Cr3+ centers in α-TeO2 : Cr. / Watterich, A.; Raksányi, K.; Gilliam, O. R.; Bartram, R. H.; Kappers, L. A.; Söthe, H.; Spaeth, J. M.

In: Journal of Physics and Chemistry of Solids, Vol. 53, No. 1, 1992, p. 189-195.

Research output: Contribution to journalArticle

Watterich, A, Raksányi, K, Gilliam, OR, Bartram, RH, Kappers, LA, Söthe, H & Spaeth, JM 1992, 'Electron spin resonance of Cr3+ and perturbed Cr3+ centers in α-TeO2: Cr', Journal of Physics and Chemistry of Solids, vol. 53, no. 1, pp. 189-195. https://doi.org/10.1016/0022-3697(92)90027-B
Watterich, A. ; Raksányi, K. ; Gilliam, O. R. ; Bartram, R. H. ; Kappers, L. A. ; Söthe, H. ; Spaeth, J. M. / Electron spin resonance of Cr3+ and perturbed Cr3+ centers in α-TeO2 : Cr. In: Journal of Physics and Chemistry of Solids. 1992 ; Vol. 53, No. 1. pp. 189-195.
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abstract = "In an electron spin resonance study of chromium-doped paratellurite, spectra for three kinds of Cr3+-related defects have been found. The first is attributed to Cr3+ in an unperturbed Te4+ site, exhibiting C2 symmetry. The other two correspond to Cr3+ ions in perturbed tellurium sites and exhibit only C1 symmetry. For one of these, the symmetry lowering is attributed to a nearby oxygen vacancy, whereas for the other, the Cr3+ local environment is perturbed by the oxygen vacancy as well as two bridging hydrogen ions. The hydrogen ions give rise to measurable superhyperfine splittings; they are changed to trapped hydrogen atoms by an electron irradiation at 77 K. The spin-Hamiltonian parameters of the Cr3+ ions are compared with those reported for the more symmetric and more ionic rutile-type hosts.",
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AU - Spaeth, J. M.

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AB - In an electron spin resonance study of chromium-doped paratellurite, spectra for three kinds of Cr3+-related defects have been found. The first is attributed to Cr3+ in an unperturbed Te4+ site, exhibiting C2 symmetry. The other two correspond to Cr3+ ions in perturbed tellurium sites and exhibit only C1 symmetry. For one of these, the symmetry lowering is attributed to a nearby oxygen vacancy, whereas for the other, the Cr3+ local environment is perturbed by the oxygen vacancy as well as two bridging hydrogen ions. The hydrogen ions give rise to measurable superhyperfine splittings; they are changed to trapped hydrogen atoms by an electron irradiation at 77 K. The spin-Hamiltonian parameters of the Cr3+ ions are compared with those reported for the more symmetric and more ionic rutile-type hosts.

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