- AutorIn
- Martin Wilkening
- Muayad Masoud
- Paul Heitjans
- Titel
- Li dynamics in amorphous LiNbO 3 as probed by solid state NMR on different length scales
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa-192899
- Quellenangabe
- Diffusion fundamentals - 8
- Quellenangabe
- Diffusion fundamentals 8 (2008) 5, S. 1-7
- Erstveröffentlichung
- 2008
- Abstract (EN)
- Long-range Li diffusion parameters of amorphous LiNbO3 are probed by 7Li two-time spin-alignment echo NMR spectroscopy which is sensitive to slow Li dynamics. The jump rates which were extracted from the spin-alignment echo decay curves exhibit Arrhenius behaviour between 293 K and 413 K. The activation energy (0.41(1)eV) is in good agreement with that of the high-temperature flank of the 7Li NMR spinlattice relaxation rate peak. The latter was predicted to be about 0.4 eV when taking into account the frequency dependence of the corresponding spin-lattice relaxation rates on the low-T flank (see Wilkening et al., Phys. Chem. Chem. Phys. 4 (2002) 3246). Previous measurements of the spin-lattice relaxation rate had to be restricted to temperatures below 450 K in order to avoid crystallization of the material. Thus, only the low-temperature flank of the diffusion induced spin-lattice relaxation rate peak had been accessible yielding information about short-range Li diffusion.
- Freie Schlagwörter (DE)
- Diffusion, Transport
- Freie Schlagwörter (EN)
- diffusion, transport
- Klassifikation (DDC)
- 530
- Herausgeber (Institution)
- Leibniz Universität Hannover
- Universität Leipzig
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa-192899
- Veröffentlichungsdatum Qucosa
- 04.01.2016
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch