On the lattice site of trivalent dopants and the structure of Mg 2+-OH--M3+ defects in LiNbO3: Mg crystals

L. Kovács, L. Rebouta, J. C. Soares, M. F. Da Silva, M. Hage-Ali, J. P. Stoquert, P. Siffert, J. A. Sanz-Garcia, G. Corradi, Z. Szaller, K. Polgar

Research output: Contribution to journalArticle

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Abstract

The lattice sites of a number of trivalent co-dopants (In, Nd, Gd, Er, Tm, and Lu) have been determined in LiNbO3 crystals also with Mg, using the Rutherford back-scattering and proton-induced X-ray emission channelling techniques. In, Er and Lu have been found mainly on Li sites, but a small fraction of In and Lu may substitute for Nb ions. Gd and Tm ions also replace mainly Li, but some of these ions seem to be present in other positions, possibly related to some kind of aggregate, e.g. self-compensating pairs. A fraction of Nd ions probably occupies interstitial sites in structurally empty oxygen octahedra, while other Nd ions may substitute for host cations. In addition to the already known effect of Cr, Fe and Nd ions, In, Lu and also Sc give rise to an OH- absorption band between 3499 and 3523 cm -1, which is attributed to Mg2+(Li site)-OH-(O site)-M3+(Nb site) complex defects. No such band is observed for Y, Gd, Er and Tm co-doped crystals.

Original languageEnglish
Article number006
Pages (from-to)781-794
Number of pages14
JournalJournal of Physics Condensed Matter
Volume5
Issue number7
DOIs
Publication statusPublished - 1993

Fingerprint

Doping (additives)
Ions
Defects
Crystals
defects
crystals
ions
substitutes
doped crystals
Crystal lattices
lithium niobate
hydroxide ion
Cations
Protons
Absorption spectra
interstitials
Positive ions
Scattering
Oxygen
absorption spectra

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

On the lattice site of trivalent dopants and the structure of Mg 2+-OH--M3+ defects in LiNbO3 : Mg crystals. / Kovács, L.; Rebouta, L.; Soares, J. C.; Da Silva, M. F.; Hage-Ali, M.; Stoquert, J. P.; Siffert, P.; Sanz-Garcia, J. A.; Corradi, G.; Szaller, Z.; Polgar, K.

In: Journal of Physics Condensed Matter, Vol. 5, No. 7, 006, 1993, p. 781-794.

Research output: Contribution to journalArticle

Kovács, L, Rebouta, L, Soares, JC, Da Silva, MF, Hage-Ali, M, Stoquert, JP, Siffert, P, Sanz-Garcia, JA, Corradi, G, Szaller, Z & Polgar, K 1993, 'On the lattice site of trivalent dopants and the structure of Mg 2+-OH--M3+ defects in LiNbO3: Mg crystals', Journal of Physics Condensed Matter, vol. 5, no. 7, 006, pp. 781-794. https://doi.org/10.1088/0953-8984/5/7/006
Kovács, L. ; Rebouta, L. ; Soares, J. C. ; Da Silva, M. F. ; Hage-Ali, M. ; Stoquert, J. P. ; Siffert, P. ; Sanz-Garcia, J. A. ; Corradi, G. ; Szaller, Z. ; Polgar, K. / On the lattice site of trivalent dopants and the structure of Mg 2+-OH--M3+ defects in LiNbO3 : Mg crystals. In: Journal of Physics Condensed Matter. 1993 ; Vol. 5, No. 7. pp. 781-794.
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T1 - On the lattice site of trivalent dopants and the structure of Mg 2+-OH--M3+ defects in LiNbO3

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AU - Soares, J. C.

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AU - Hage-Ali, M.

AU - Stoquert, J. P.

AU - Siffert, P.

AU - Sanz-Garcia, J. A.

AU - Corradi, G.

AU - Szaller, Z.

AU - Polgar, K.

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AB - The lattice sites of a number of trivalent co-dopants (In, Nd, Gd, Er, Tm, and Lu) have been determined in LiNbO3 crystals also with Mg, using the Rutherford back-scattering and proton-induced X-ray emission channelling techniques. In, Er and Lu have been found mainly on Li sites, but a small fraction of In and Lu may substitute for Nb ions. Gd and Tm ions also replace mainly Li, but some of these ions seem to be present in other positions, possibly related to some kind of aggregate, e.g. self-compensating pairs. A fraction of Nd ions probably occupies interstitial sites in structurally empty oxygen octahedra, while other Nd ions may substitute for host cations. In addition to the already known effect of Cr, Fe and Nd ions, In, Lu and also Sc give rise to an OH- absorption band between 3499 and 3523 cm -1, which is attributed to Mg2+(Li site)-OH-(O site)-M3+(Nb site) complex defects. No such band is observed for Y, Gd, Er and Tm co-doped crystals.

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