NMR spin-lattice relaxation study of Li-7 and Nb-93 nuclei in Ti- or Fe-doped LiNbO3:Mg single crystals

作者：Yeom Tae Ho; Lim Ae Ran^*

来源：AIP Advances, 2016, 6(4): 045102.

DOI：10.1063/1.4945758

In this study, to understand the effects of paramagnetic impurities, we investigated the temperature dependent of the spin-lattice relaxation times of pure LiNbO3, LiNbO3: Mg, LiNbO3: Mg/Ti, LiNbO3: Mg/Fe, and LiNbO3: Mg/Fe (thermally treated at 500 degrees C) single crystals. The results for the LiNbO3: Mg single crystals doped with Fe3+ or Ti3+ are discussed with respect to the site distribution and atomic mobility of Li and Nb. In addition, the effects of a thermal treatment on LiNbO3: Mg/Fe single crystals were examined based on the T-1 analysis of Li-7 and Nb-93. It was found that the presence of impurities in the crystals induced systematic changes of activation energies concerning atomic mobility.

• 出版日期2016-4