Details
| Original language | English |
|---|---|
| Pages (from-to) | 1341-1350 |
| Number of pages | 10 |
| Journal | Zeitschrift fur Physikalische Chemie |
| Volume | 229 |
| Issue number | 9 |
| Publication status | Published - 28 Sept 2015 |
Abstract
We investigated lithium self-diffusion in amorphous lithium aluminate (LiAlO2) layers between room temperature and 473 K. For the experiments, amorphous 6LiAlO2 (30 nm)/7LiAlO2 (1200 nm) isotope hetero-structures were deposited by ion-beam sputtering on sapphire substrates. Diffusion profiles were analysed by secondary ion mass spectrometry (SIMS). The results show that the diffusivities obey the Arrhenius law with an activation enthalpy of (0.94±0.02) eV. This is not much different to the activation enthalpy of 1.14 eV found for LiAlO2 single crystals by impedance spectroscopy. It rationalizes the only modest enhancement of diffusivities in amorphous lithium aluminate compared to single crystals of three to five orders of magnitude in the temperature range studied, when compared with, e.g., lithium niobate.
Keywords
- Amorphous Lithium Aluminate, 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. 229, No. 9, 28.09.2015, p. 1341-1350.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Lithium Diffusion in Ion-Beam Sputtered Amorphous LiAlO2
AU - Rahn, Johanna
AU - Witt, Elena
AU - Heitjans, Paul
AU - Schmidt, Harald
N1 - Publisher Copyright: © 2015 Walter de Gruyter.
PY - 2015/9/28
Y1 - 2015/9/28
N2 - We investigated lithium self-diffusion in amorphous lithium aluminate (LiAlO2) layers between room temperature and 473 K. For the experiments, amorphous 6LiAlO2 (30 nm)/7LiAlO2 (1200 nm) isotope hetero-structures were deposited by ion-beam sputtering on sapphire substrates. Diffusion profiles were analysed by secondary ion mass spectrometry (SIMS). The results show that the diffusivities obey the Arrhenius law with an activation enthalpy of (0.94±0.02) eV. This is not much different to the activation enthalpy of 1.14 eV found for LiAlO2 single crystals by impedance spectroscopy. It rationalizes the only modest enhancement of diffusivities in amorphous lithium aluminate compared to single crystals of three to five orders of magnitude in the temperature range studied, when compared with, e.g., lithium niobate.
AB - We investigated lithium self-diffusion in amorphous lithium aluminate (LiAlO2) layers between room temperature and 473 K. For the experiments, amorphous 6LiAlO2 (30 nm)/7LiAlO2 (1200 nm) isotope hetero-structures were deposited by ion-beam sputtering on sapphire substrates. Diffusion profiles were analysed by secondary ion mass spectrometry (SIMS). The results show that the diffusivities obey the Arrhenius law with an activation enthalpy of (0.94±0.02) eV. This is not much different to the activation enthalpy of 1.14 eV found for LiAlO2 single crystals by impedance spectroscopy. It rationalizes the only modest enhancement of diffusivities in amorphous lithium aluminate compared to single crystals of three to five orders of magnitude in the temperature range studied, when compared with, e.g., lithium niobate.
KW - Amorphous Lithium Aluminate
KW - Isotope Hetero-Structures
KW - Secondary Ion Mass Spectrometry
KW - Self-Diffusion
UR - http://www.scopus.com/inward/record.url?scp=84941711104&partnerID=8YFLogxK
U2 - 10.1515/zpch-2014-0658
DO - 10.1515/zpch-2014-0658
M3 - Article
AN - SCOPUS:84941711104
VL - 229
SP - 1341
EP - 1350
JO - Zeitschrift fur Physikalische Chemie
JF - Zeitschrift fur Physikalische Chemie
SN - 0942-9352
IS - 9
ER -