Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1317-1322 |
| Seitenumfang | 6 |
| Fachzeitschrift | Defect and Diffusion Forum |
| Jahrgang | 143-147 |
| Publikationsstatus | Veröffentlicht - 1997 |
Abstract
The diffusion-induced spin-lattice relaxation (SLR) in a high-purity lithium single crystal has been studied with β-radiation-detected NMR (β-NMR) using the probe 8Li (T1/2 = 0.8 s). The SLR rate has been measured between 225 K and 440 K in magnetic fields corresponding to frequencies between 52 kHz and 11 MHz. The data are analysed in terms of a random walk on a bcc lattice. For the activation enthalpy of self-diffusion, HSD, the value 0.57(1) eV is obtained in agreement with a previous β-NMR study of polycrystalline lithium. Comparison with literature values for the migration enthalpy of monovacancies and the most recent ab-initio pseudopotential calculations for the formation enthalpy, which give H F = 0.52 eV, indicates that this is compatible with single vacancies being the main vehicles of self-diffusion in Li.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Strahlung
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
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in: Defect and Diffusion Forum, Jahrgang 143-147, 1997, S. 1317-1322.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Diffusion-induced β-NMR relaxation in single-crystal lithium
AU - Schirmer, A.
AU - Heitjans, P.
AU - Majer, G.
AU - Seeger, A.
PY - 1997
Y1 - 1997
N2 - The diffusion-induced spin-lattice relaxation (SLR) in a high-purity lithium single crystal has been studied with β-radiation-detected NMR (β-NMR) using the probe 8Li (T1/2 = 0.8 s). The SLR rate has been measured between 225 K and 440 K in magnetic fields corresponding to frequencies between 52 kHz and 11 MHz. The data are analysed in terms of a random walk on a bcc lattice. For the activation enthalpy of self-diffusion, HSD, the value 0.57(1) eV is obtained in agreement with a previous β-NMR study of polycrystalline lithium. Comparison with literature values for the migration enthalpy of monovacancies and the most recent ab-initio pseudopotential calculations for the formation enthalpy, which give H F = 0.52 eV, indicates that this is compatible with single vacancies being the main vehicles of self-diffusion in Li.
AB - The diffusion-induced spin-lattice relaxation (SLR) in a high-purity lithium single crystal has been studied with β-radiation-detected NMR (β-NMR) using the probe 8Li (T1/2 = 0.8 s). The SLR rate has been measured between 225 K and 440 K in magnetic fields corresponding to frequencies between 52 kHz and 11 MHz. The data are analysed in terms of a random walk on a bcc lattice. For the activation enthalpy of self-diffusion, HSD, the value 0.57(1) eV is obtained in agreement with a previous β-NMR study of polycrystalline lithium. Comparison with literature values for the migration enthalpy of monovacancies and the most recent ab-initio pseudopotential calculations for the formation enthalpy, which give H F = 0.52 eV, indicates that this is compatible with single vacancies being the main vehicles of self-diffusion in Li.
KW - Defect mechanisms
KW - Lithium
KW - Self-diffusion
KW - β-Radiation-detected NMR
UR - http://www.scopus.com/inward/record.url?scp=4244141374&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/DDF.143-147.1317
DO - 10.4028/www.scientific.net/DDF.143-147.1317
M3 - Article
AN - SCOPUS:4244141374
VL - 143-147
SP - 1317
EP - 1322
JO - Defect and Diffusion Forum
JF - Defect and Diffusion Forum
SN - 1012-0386
ER -