Lattice site of rare-earth ions in stoichiometric lithium niobate probed by OH- vibrational spectroscopy

L. Kovács, Laura Kocsor, Zsuzsanna Szaller, Ivett Hajdara, Gabriella Dravecz, K. Lengyel, G. Corradi

Research output: Article

3 Citations (Scopus)

Abstract

Rare-earth (RE = Er3+, Nd3+, or Yb3+) ion-doped stoichiometric LiNbO3 crystals were grown by the Czochralski and the high-temperature top-seeded solution growth methods. For the 0.22–0.87 mol% concentration range of the RE oxides in the melt/solution, in addition to the well-known hydroxyl (OH) vibrational band in undoped stoichiometric LiNbO3, a new infrared absorption band was observed at about 3500 cm−1, similar to the case of the trivalent optical damage resistant (ODR) dopants In3+ and Sc3+. By comparing the frequencies and polarization dependences of the bands to those detected for ODR ion containing crystals, they are attributed to the stretching vibration of OH ions in RE3+Nb-OH complexes. Consequently, above a given concentration threshold, some of the rare-earth ions are assumed to occupy niobium sites in the LiNbO3 lattice. The same model is also suggested for RE-doped congruent LiNbO3 crystals containing over-threshold (>5 mol %) amounts of the Mg-co-dopant.

Original languageEnglish
Article number230
JournalCrystals
Volume7
Issue number8
DOIs
Publication statusPublished - aug. 1 2017

Fingerprint

Vibrational spectroscopy
lithium niobates
Rare earths
Lithium
rare earth elements
Ions
spectroscopy
Crystals
ions
Niobium
Doping (additives)
damage
crystals
thresholds
Infrared absorption
niobium
Hydroxyl Radical
Oxides
infrared absorption
Stretching

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

Cite this

Lattice site of rare-earth ions in stoichiometric lithium niobate probed by OH- vibrational spectroscopy. / Kovács, L.; Kocsor, Laura; Szaller, Zsuzsanna; Hajdara, Ivett; Dravecz, Gabriella; Lengyel, K.; Corradi, G.

In: Crystals, Vol. 7, No. 8, 230, 01.08.2017.

Research output: Article

Kovács, L. ; Kocsor, Laura ; Szaller, Zsuzsanna ; Hajdara, Ivett ; Dravecz, Gabriella ; Lengyel, K. ; Corradi, G. / Lattice site of rare-earth ions in stoichiometric lithium niobate probed by OH- vibrational spectroscopy. In: Crystals. 2017 ; Vol. 7, No. 8.
@article{6459b25a5b7d4c73807a4e61f85378c3,
title = "Lattice site of rare-earth ions in stoichiometric lithium niobate probed by OH- vibrational spectroscopy",
abstract = "Rare-earth (RE = Er3+, Nd3+, or Yb3+) ion-doped stoichiometric LiNbO3 crystals were grown by the Czochralski and the high-temperature top-seeded solution growth methods. For the 0.22–0.87 mol{\%} concentration range of the RE oxides in the melt/solution, in addition to the well-known hydroxyl (OH−) vibrational band in undoped stoichiometric LiNbO3, a new infrared absorption band was observed at about 3500 cm−1, similar to the case of the trivalent optical damage resistant (ODR) dopants In3+ and Sc3+. By comparing the frequencies and polarization dependences of the bands to those detected for ODR ion containing crystals, they are attributed to the stretching vibration of OH− ions in RE3+Nb-OH− complexes. Consequently, above a given concentration threshold, some of the rare-earth ions are assumed to occupy niobium sites in the LiNbO3 lattice. The same model is also suggested for RE-doped congruent LiNbO3 crystals containing over-threshold (>5 mol {\%}) amounts of the Mg-co-dopant.",
keywords = "Hydroxyl ions, IR spectroscopy, Lithium niobate, Rare-earth dopants",
author = "L. Kov{\'a}cs and Laura Kocsor and Zsuzsanna Szaller and Ivett Hajdara and Gabriella Dravecz and K. Lengyel and G. Corradi",
year = "2017",
month = "8",
day = "1",
doi = "10.3390/cryst7080230",
language = "English",
volume = "7",
journal = "Crystals",
issn = "2073-4352",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "8",

}

TY - JOUR

T1 - Lattice site of rare-earth ions in stoichiometric lithium niobate probed by OH- vibrational spectroscopy

AU - Kovács, L.

AU - Kocsor, Laura

AU - Szaller, Zsuzsanna

AU - Hajdara, Ivett

AU - Dravecz, Gabriella

AU - Lengyel, K.

AU - Corradi, G.

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Rare-earth (RE = Er3+, Nd3+, or Yb3+) ion-doped stoichiometric LiNbO3 crystals were grown by the Czochralski and the high-temperature top-seeded solution growth methods. For the 0.22–0.87 mol% concentration range of the RE oxides in the melt/solution, in addition to the well-known hydroxyl (OH−) vibrational band in undoped stoichiometric LiNbO3, a new infrared absorption band was observed at about 3500 cm−1, similar to the case of the trivalent optical damage resistant (ODR) dopants In3+ and Sc3+. By comparing the frequencies and polarization dependences of the bands to those detected for ODR ion containing crystals, they are attributed to the stretching vibration of OH− ions in RE3+Nb-OH− complexes. Consequently, above a given concentration threshold, some of the rare-earth ions are assumed to occupy niobium sites in the LiNbO3 lattice. The same model is also suggested for RE-doped congruent LiNbO3 crystals containing over-threshold (>5 mol %) amounts of the Mg-co-dopant.

AB - Rare-earth (RE = Er3+, Nd3+, or Yb3+) ion-doped stoichiometric LiNbO3 crystals were grown by the Czochralski and the high-temperature top-seeded solution growth methods. For the 0.22–0.87 mol% concentration range of the RE oxides in the melt/solution, in addition to the well-known hydroxyl (OH−) vibrational band in undoped stoichiometric LiNbO3, a new infrared absorption band was observed at about 3500 cm−1, similar to the case of the trivalent optical damage resistant (ODR) dopants In3+ and Sc3+. By comparing the frequencies and polarization dependences of the bands to those detected for ODR ion containing crystals, they are attributed to the stretching vibration of OH− ions in RE3+Nb-OH− complexes. Consequently, above a given concentration threshold, some of the rare-earth ions are assumed to occupy niobium sites in the LiNbO3 lattice. The same model is also suggested for RE-doped congruent LiNbO3 crystals containing over-threshold (>5 mol %) amounts of the Mg-co-dopant.

KW - Hydroxyl ions

KW - IR spectroscopy

KW - Lithium niobate

KW - Rare-earth dopants

UR - http://www.scopus.com/inward/record.url?scp=85026630537&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85026630537&partnerID=8YFLogxK

U2 - 10.3390/cryst7080230

DO - 10.3390/cryst7080230

M3 - Article

AN - SCOPUS:85026630537

VL - 7

JO - Crystals

JF - Crystals

SN - 2073-4352

IS - 8

M1 - 230

ER -