dc.identifier.uri |
http://dx.doi.org/10.15488/2254 |
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dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/2280 |
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dc.contributor.author |
Qi, F.
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|
dc.contributor.author |
Rier, C.
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|
dc.contributor.author |
Böhmer, R.
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dc.contributor.author |
Franke, W.
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dc.contributor.author |
Heitjans, Paul
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dc.date.accessioned |
2017-11-10T17:50:57Z |
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dc.date.available |
2017-11-10T17:50:57Z |
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dc.date.issued |
2005 |
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dc.identifier.citation |
Qi, F.; Rier, C.; Böhmer, R.; Franke, W.; Heitjans, P.: Ion hopping in crystalline and glassy spodumene LiAlSi2O6: Li7 spin-lattice relaxation and Li7 echo NMR spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics 72 (2005), Nr. 10, 104301. DOI: https://doi.org/10.1103/PhysRevB.72.104301 |
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dc.description.abstract |
Nuclear magnetic resonance spectroscopy was used to study polycrystalline β-spodumene (β−LiAlSi2O6) as well as glassy specimens with the same chemical composition. 7Li spin-lattice relaxation measurements were carried out in a broad temperature range and for several Larmor frequencies. In addition to a pronounced rate maximum at high temperatures, stemming from the long-range Li motion in these aluminosilicates, we found a weak maximum in the crystalline modification near 120K. The latter result confirms the existence of a local double-well structure in which the Li ions reside. The ionic motion was also monitored by solid- and stimulated-echo spectra as well as by the decay of the Jeener-Broekaert echo. Under conditions which are discussed in detail, the latter is a direct measure of the hopping correlation function. For the glass this function was found to decay faster and more stretched than that of the crystal at a given temperature. Furthermore, the relevant barriers against the high-temperature long-range Li motion are larger in the crystal as compared to the glass. © 2005 The American Physical Society. |
eng |
dc.language.iso |
eng |
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dc.publisher |
College Park, ML : American Physical Society |
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dc.relation.ispartofseries |
Physical Review B 72 (2005), Nr. 10 |
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dc.rights |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. |
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dc.subject |
Nuclear Magnetic Resonance (NMR) |
eng |
dc.subject.ddc |
530 | Physik
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ger |
dc.title |
Ion hopping in crystalline and glassy spodumene LiAlSi2O6: Li7 spin-lattice relaxation and Li7 echo NMR spectroscopy |
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dc.type |
Article |
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dc.type |
Text |
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dc.relation.issn |
10980121 |
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dc.relation.doi |
https://doi.org/10.1103/PhysRevB.72.104301 |
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dc.bibliographicCitation.issue |
10 |
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dc.bibliographicCitation.volume |
72 |
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dc.bibliographicCitation.firstPage |
104301 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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