Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5420911 | Solid State Nuclear Magnetic Resonance | 2007 | 12 Pages |
Abstract
Fluorine nuclear magnetic resonance (NMR) spin-lattice relaxation dispersion has been measured for pure LaF3 and La1âxSrxF3âx for admixture concentrations x ranging from 0.01% up to 16%. The relaxation dispersion experiments have been carried out in a wide frequency range (20Â kHz-40Â MHz) at temperatures between 300 and 1400Â K. The data have been analyzed using the recently published [J. Magn. Res. 179 (2006) 250] relaxation model for multispin systems of mutually interacting quadrupolar and dipolar nuclei. Rate constants of the fluorine ionic jumps within and among distinct fluorine sublattices have been extracted. Characteristic effects of the polarization transfer between fluorine and lanthanum spins have been observed and attributed to slow dynamics within one of the fluorine sublattices.
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Authors
O. Lips, D. Kruk, A. Privalov, F. Fujara,