Nuclear magnetic resonance study of superprotonic conductor Rb4LiH3(SO4)(4) single crystals

作者：Lim Ae Ran^*; Paik Younkee; Heo Cheol; Chang Jin Hae

来源：Solid State Nuclear Magnetic Resonance, 2013, 54: 41-46.

DOI：10.1016/j.ssnmr.2013.06.003

• Ferroelastic
• Phase transitions
• Superionic materials
• Nuclear magnetic resonance

To investigate the molecular dynamics of a Rb4LiH3(SO4)(4) crystal below superionic phase transitions, we examined the temperature dependences of the NMR spectra and the spin-lattice relaxation time, T-1, of the H-1, Li-7, and Rb-87 nuclei. The symmetry of H-1 signals resembles the Pake doublet containing a pair of dipolar-coupled protons. From the temperature dependence of T-1, the activation energy of proton at high temperature is twice of those of Li-7 and Rb-87. A striking feature was the formation of the weak hydrogen bond creating a significant influence of proton at high temperatures due to the mobility of the hydrogen-bond protons. And, we compared these data with H-1 and Li-7 results for (NH4)(4)LiH3(SO4)(4) and K4LiH3(SO4)(4) crystals, which have similar structures.

• 出版日期2013-9