Details
| Original language | English |
|---|---|
| Pages (from-to) | 3670-3674 |
| Number of pages | 5 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 16 |
| Issue number | 8 |
| Publication status | Published - 28 Feb 2014 |
Abstract
The self-diffusion of lithium in congruent LiNbO3 single crystals was investigated at low temperatures between 379 and 523 K by neutron reflectometry. From measurements on 6LiNbO3 (amorphous film)/natLiNbO3 (single crystal) samples, Li self-diffusivities were determined in single crystals down to extremely low values of 1 × 10-25 m2 s-1 on small length scales of 1-10 nm. The measured diffusivities are in excellent agreement with (extrapolated) literature data obtained by experiments based on Secondary Ion Mass Spectrometry and Impedance Spectroscopy. The tracer diffusivities can be described by a single Arrhenius line over ten orders of magnitude with an activation enthalpy of 1.33 eV, which corresponds to the migration energy of a single Li vacancy. A deviation from the Arrhenius behaviour at low temperatures, e.g., due to defect cluster formation is not observed.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemistry(all)
- Physical and Theoretical Chemistry
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Physical Chemistry Chemical Physics, Vol. 16, No. 8, 28.02.2014, p. 3670-3674.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Lithium diffusion in congruent LiNbO3 single crystals at low temperatures probed by neutron reflectometry
AU - Hüger, E.
AU - Rahn, J.
AU - Stahn, J.
AU - Geue, T.
AU - Heitjans, P.
AU - Schmidt, H.
PY - 2014/2/28
Y1 - 2014/2/28
N2 - The self-diffusion of lithium in congruent LiNbO3 single crystals was investigated at low temperatures between 379 and 523 K by neutron reflectometry. From measurements on 6LiNbO3 (amorphous film)/natLiNbO3 (single crystal) samples, Li self-diffusivities were determined in single crystals down to extremely low values of 1 × 10-25 m2 s-1 on small length scales of 1-10 nm. The measured diffusivities are in excellent agreement with (extrapolated) literature data obtained by experiments based on Secondary Ion Mass Spectrometry and Impedance Spectroscopy. The tracer diffusivities can be described by a single Arrhenius line over ten orders of magnitude with an activation enthalpy of 1.33 eV, which corresponds to the migration energy of a single Li vacancy. A deviation from the Arrhenius behaviour at low temperatures, e.g., due to defect cluster formation is not observed.
AB - The self-diffusion of lithium in congruent LiNbO3 single crystals was investigated at low temperatures between 379 and 523 K by neutron reflectometry. From measurements on 6LiNbO3 (amorphous film)/natLiNbO3 (single crystal) samples, Li self-diffusivities were determined in single crystals down to extremely low values of 1 × 10-25 m2 s-1 on small length scales of 1-10 nm. The measured diffusivities are in excellent agreement with (extrapolated) literature data obtained by experiments based on Secondary Ion Mass Spectrometry and Impedance Spectroscopy. The tracer diffusivities can be described by a single Arrhenius line over ten orders of magnitude with an activation enthalpy of 1.33 eV, which corresponds to the migration energy of a single Li vacancy. A deviation from the Arrhenius behaviour at low temperatures, e.g., due to defect cluster formation is not observed.
UR - http://www.scopus.com/inward/record.url?scp=84893472349&partnerID=8YFLogxK
U2 - 10.1039/c3cp54939a
DO - 10.1039/c3cp54939a
M3 - Article
AN - SCOPUS:84893472349
VL - 16
SP - 3670
EP - 3674
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 8
ER -