7Li NMR analysis on perovskite structured Li0.15La0.28TaO3

Autor:	Robert L. Vold, Odile Bohnke, J. Emery, Gina L. Hoatson, M. Vijayakumar
Rok vydání:	2006
Předmět:	Oxide Analytical chemistry chemistry.chemical_element Pulse sequence General Chemistry Atmospheric temperature range Condensed Matter Physics Nanocrystalline material chemistry.chemical_compound chemistry Spin echo Relaxation (physics) General Materials Science Lithium Perovskite (structure)
Zdroj:	Solid State Ionics. 177:1673-1676
ISSN:	0167-2738
DOI:	10.1016/j.ssi.2006.07.026
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d670074e995cbe159158bcf90eb0af30 https://doi.org/10.1016/j.ssi.2006.07.026 Zobrazit plný text záznamu Full Text from ScienceDirect