Abstract
OH stretching vibrations in LiNbO3 (LN) crystals having various Li/Nb ratios and doped with Mg above the photorefractive threshold concentration were investigated in the 20-500 °C temperature range. Beside the 3534 cm-1 above-threshold band another peak at about 3465 cm-1, known from below-threshold stoichiometric LN, was found to appear at a temperature depending on the Mg surplus concentration and grow further with increasing temperature at the expense of the 3534 cm-1 band. The energy difference between the OH- ions was determined to be Δ E=0.25±0.02 eV independently from the composition and Mg concentration. A kinetic model describing the thermal process predicts a linear Mg surplus dependence of the ratio of band areas at a given temperature.
| Original language | English |
|---|---|
| Article number | 191907 |
| Journal | Applied Physics Letters |
| Volume | 96 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 2010 |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Thermal kinetics of OH- ions in LiNbO3 : Mg crystals above the photorefractive threshold. / Lengyel, K.; Kovács, L.; Péter, A.; Polgár, K.; Corradi, G.; Baraldi, A.; Capelletti, R.
In: Applied Physics Letters, Vol. 96, No. 19, 191907, 2010.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermal kinetics of OH- ions in LiNbO3
T2 - Mg crystals above the photorefractive threshold
AU - Lengyel, K.
AU - Kovács, L.
AU - Péter, A.
AU - Polgár, K.
AU - Corradi, G.
AU - Baraldi, A.
AU - Capelletti, R.
PY - 2010
Y1 - 2010
N2 - OH stretching vibrations in LiNbO3 (LN) crystals having various Li/Nb ratios and doped with Mg above the photorefractive threshold concentration were investigated in the 20-500 °C temperature range. Beside the 3534 cm-1 above-threshold band another peak at about 3465 cm-1, known from below-threshold stoichiometric LN, was found to appear at a temperature depending on the Mg surplus concentration and grow further with increasing temperature at the expense of the 3534 cm-1 band. The energy difference between the OH- ions was determined to be Δ E=0.25±0.02 eV independently from the composition and Mg concentration. A kinetic model describing the thermal process predicts a linear Mg surplus dependence of the ratio of band areas at a given temperature.
AB - OH stretching vibrations in LiNbO3 (LN) crystals having various Li/Nb ratios and doped with Mg above the photorefractive threshold concentration were investigated in the 20-500 °C temperature range. Beside the 3534 cm-1 above-threshold band another peak at about 3465 cm-1, known from below-threshold stoichiometric LN, was found to appear at a temperature depending on the Mg surplus concentration and grow further with increasing temperature at the expense of the 3534 cm-1 band. The energy difference between the OH- ions was determined to be Δ E=0.25±0.02 eV independently from the composition and Mg concentration. A kinetic model describing the thermal process predicts a linear Mg surplus dependence of the ratio of band areas at a given temperature.
UR - http://www.scopus.com/inward/record.url?scp=77952971540&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952971540&partnerID=8YFLogxK
U2 - 10.1063/1.3428772
DO - 10.1063/1.3428772
M3 - Article
AN - SCOPUS:77952971540
VL - 96
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 19
M1 - 191907
ER -