Title of article
7Li NMR analysis on perovskite structured Li0.15La0.28TaO3
Author/Authors
Vijayakumar، نويسنده , , M. and Emery، نويسنده , , Joël and Bohnke، نويسنده , , Odile and Vold، نويسنده , , Robert L. and Hoatson، نويسنده , , Gina L.، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2006
Pages
4
From page
1673
To page
1676
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 300 spectrometer at 116 MHz over the temperature range 150 to 400 K. Longitudinal spin-lattice relaxation times (T1) measured by saturation recovery and longitudinal relaxation times in the rotating frame (T1ρ) measured using the pulse sequence (π/2–spin lock τ acquisition) with lock radio-frequency field υ = 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 T1ρ show two different types of lithium cations with fast and slow dynamics.
Keywords
Perovskite oxides , Relaxation measurement , 7Li NMR , ionic conductors
Journal title
Solid State Ionics
Serial Year
2006
Journal title
Solid State Ionics
Record number
1719136
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