Details
| Original language | English |
|---|---|
| Pages (from-to) | 431-437 |
| Number of pages | 7 |
| Journal | Zeitschrift fur Physikalische Chemie |
| Volume | 226 |
| Issue number | 5-6 |
| Publication status | Published - Jun 2012 |
Abstract
We report on conductivity measurements of LiNbO3 single crystals with congruent composition in ambient atmosphere between 449 and 727 K which include the lowest temperatures covered so far. The ionic DC conductivity observed along the c-axis at, e. g., 650 K is 6.7×10-9 S/cm and shows an activation energy of 1.33 eV. The corresponding Li+ diffusion coefficients range between 2.5×10-22 and 1.4×10 -16 m2/s. These results are perfectly consistent with our conductivity results in the high-temperature regime as well as SIMS measurements published recently (Rahn et al., Phys. Chem. Chem. Phys. 14 (2012) 2427). From the Li+ diffusion coefficients obtained here a Haven ratio of 0.7(2) can be deduced.
Keywords
- Haven ratio, Impedance spectroscopy, Ionic conductivity, Lithium niobate, Self-diffusion
ASJC Scopus subject areas
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Zeitschrift fur Physikalische Chemie, Vol. 226, No. 5-6, 06.2012, p. 431-437.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Low-temperature DC conductivity of LiNbO3 single crystals
AU - Ruprecht, B.
AU - Rahn, J.
AU - Schmidt, H.
AU - Heitjans, P.
N1 - Funding Information: Financial support from the Deutsche Forschungsgemeinschaft (DFG) in the framework of the research unit FOR 1277 (‘molife’) is gratefully acknowledged. We thank Prof. M. Wilkening for access to the impedance analyzer system Concept 80 as well as Dr. I. Hanzu and Dr. E. Hüger for helpful discussions.
PY - 2012/6
Y1 - 2012/6
N2 - We report on conductivity measurements of LiNbO3 single crystals with congruent composition in ambient atmosphere between 449 and 727 K which include the lowest temperatures covered so far. The ionic DC conductivity observed along the c-axis at, e. g., 650 K is 6.7×10-9 S/cm and shows an activation energy of 1.33 eV. The corresponding Li+ diffusion coefficients range between 2.5×10-22 and 1.4×10 -16 m2/s. These results are perfectly consistent with our conductivity results in the high-temperature regime as well as SIMS measurements published recently (Rahn et al., Phys. Chem. Chem. Phys. 14 (2012) 2427). From the Li+ diffusion coefficients obtained here a Haven ratio of 0.7(2) can be deduced.
AB - We report on conductivity measurements of LiNbO3 single crystals with congruent composition in ambient atmosphere between 449 and 727 K which include the lowest temperatures covered so far. The ionic DC conductivity observed along the c-axis at, e. g., 650 K is 6.7×10-9 S/cm and shows an activation energy of 1.33 eV. The corresponding Li+ diffusion coefficients range between 2.5×10-22 and 1.4×10 -16 m2/s. These results are perfectly consistent with our conductivity results in the high-temperature regime as well as SIMS measurements published recently (Rahn et al., Phys. Chem. Chem. Phys. 14 (2012) 2427). From the Li+ diffusion coefficients obtained here a Haven ratio of 0.7(2) can be deduced.
KW - Haven ratio
KW - Impedance spectroscopy
KW - Ionic conductivity
KW - Lithium niobate
KW - Self-diffusion
UR - http://www.scopus.com/inward/record.url?scp=84862899346&partnerID=8YFLogxK
U2 - 10.1524/zpch.2012.0226
DO - 10.1524/zpch.2012.0226
M3 - Article
AN - SCOPUS:84862899346
VL - 226
SP - 431
EP - 437
JO - Zeitschrift fur Physikalische Chemie
JF - Zeitschrift fur Physikalische Chemie
SN - 0942-9352
IS - 5-6
ER -