NDA@SZTAKI

Lattice Site of Rare-Earth Ions in Stoichiometric Lithium Niobate Probed by OH− Vibrational Spectroscopy

KovĂĄcs, LĂĄszlĂł

Kocsor, Laura

Szaller, Zsuzsanna

Hajdara, Ivett

Dravecz, Gabriella

Lengyel, KrisztiĂĄn

GĂĄbor, Corradi

MDPI

2017-07-25

QC06 Physics of condensed matter / szilĂĄrdtestfizika

QD05 Crystallography / kristĂĄlytan

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.

magyar

Article

PeerReviewed

info:eu-repo/semantics/article

text

http://real.mtak.hu/63749/1/klengyel_LiNbO3_RE_OH_2017_C.pdf

Kovács, László and Kocsor, Laura and Szaller, Zsuzsanna and Hajdara, Ivett and Dravecz, Gabriella and Lengyel, Krisztián and Gábor, Corradi (2017) Lattice Site of Rare-Earth Ions in Stoichiometric Lithium Niobate Probed by OH− Vibrational Spectroscopy. Crystals, 7 (8). p. 230. ISSN 2073-4352

http://real.mtak.hu/63749/

https://doi.org/10.3390/cryst7080230

doi:10.3390/cryst7080230