| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1297486 | Solid State Ionics | 2006 | 4 Pages |
Abstract
The nanocrystalline perovskite material Li0.15La0.28TaO3 has been synthesized by alkoxide-free Pechini type sol gel method. 7Li NMR measurements were carried out using a Bruker Avance 300Â spectrometer at 116Â MHz over the temperature range 150 to 400Â K. Longitudinal spin-lattice relaxation times (T1) measured by saturation recovery and longitudinal relaxation times in the rotating frame (T1Ï) measured using the pulse sequence (Ï/2-spin lock Ï acquisition) with lock radio-frequency field Ï
 = 62.5 kHz and the T2 relaxation time measured by Hahn echo are presented. The static Hahn-echo spectra show two different lithium sites in this perovskite oxide. Further, the relaxation measurements T1 and T1Ï show two different types of lithium cations with fast and slow dynamics.
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Authors
M. Vijayakumar, Joel Emery, Odile Bohnke, Robert L. Vold, Gina L. Hoatson,