Details
| Original language | English |
|---|---|
| Pages (from-to) | 439-448 |
| Number of pages | 10 |
| Journal | Zeitschrift fur Physikalische Chemie |
| Volume | 226 |
| Issue number | 5-6 |
| Publication status | Published - Jun 2012 |
Abstract
We investigated lithium self-diffusion in amorphous lithium niobate layers between 298 and 423 K. For the experiments, amorphous 6LiNbO 3/7LiNbO3 isotope hetero-structures were deposited by ion beam sputtering and analysed after diffusion annealing by secondary ion mass spectrometry (SIMS). This arrangement allows one to study pure isotope interdiffusion. The results show that the diffusivities obey the Arrhenius law with an activation enthalpy of 0.7 eV, which is considerably lower than the activation enthalpy found for LiNbO3 single crystals in literature. Consequently, the Li diffusivities are higher by at least eight orders of magnitude in the amorphous samples in the temperature range studied.
Keywords
- Amorphous lithium niobate, Isotope hetero-structures, Secondary ion mass spectrometry, 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. 439-448.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Self-diffusion of lithium in amorphous lithium niobate layers
AU - Rahn, Johanna
AU - Hüger, Erwin
AU - Dörrer, Lars
AU - Ruprecht, Benjamin
AU - Heitjans, Paul
AU - Schmidt, Harald
N1 - Funding Information: Financial support from the Deutsche Forschungsgemeinschaft (DFG) in the framework of the research unit FOR 1277 (“molife”) is gratefully acknowledged.
PY - 2012/6
Y1 - 2012/6
N2 - We investigated lithium self-diffusion in amorphous lithium niobate layers between 298 and 423 K. For the experiments, amorphous 6LiNbO 3/7LiNbO3 isotope hetero-structures were deposited by ion beam sputtering and analysed after diffusion annealing by secondary ion mass spectrometry (SIMS). This arrangement allows one to study pure isotope interdiffusion. The results show that the diffusivities obey the Arrhenius law with an activation enthalpy of 0.7 eV, which is considerably lower than the activation enthalpy found for LiNbO3 single crystals in literature. Consequently, the Li diffusivities are higher by at least eight orders of magnitude in the amorphous samples in the temperature range studied.
AB - We investigated lithium self-diffusion in amorphous lithium niobate layers between 298 and 423 K. For the experiments, amorphous 6LiNbO 3/7LiNbO3 isotope hetero-structures were deposited by ion beam sputtering and analysed after diffusion annealing by secondary ion mass spectrometry (SIMS). This arrangement allows one to study pure isotope interdiffusion. The results show that the diffusivities obey the Arrhenius law with an activation enthalpy of 0.7 eV, which is considerably lower than the activation enthalpy found for LiNbO3 single crystals in literature. Consequently, the Li diffusivities are higher by at least eight orders of magnitude in the amorphous samples in the temperature range studied.
KW - Amorphous lithium niobate
KW - Isotope hetero-structures
KW - Secondary ion mass spectrometry
KW - Self-diffusion
UR - http://www.scopus.com/inward/record.url?scp=84862847107&partnerID=8YFLogxK
U2 - 10.1524/zpch.2012.0214
DO - 10.1524/zpch.2012.0214
M3 - Article
AN - SCOPUS:84862847107
VL - 226
SP - 439
EP - 448
JO - Zeitschrift fur Physikalische Chemie
JF - Zeitschrift fur Physikalische Chemie
SN - 0942-9352
IS - 5-6
ER -