Thermally Activated Motion of Sodium Cations in Insulating Parent Low-Silica X Zeolite

Abstract

We report a ${}^{23}$Na spin-lattice relaxation rate, $T_1^{-1}$, in low-silica X zeolite. $T_1^{-1}$ follows multiple BPP-type behavior as a result of thermal motion of sodium cations in insulating material. The estimated lowest activation energy of 15~meV is much lower than 100~meV observed previously for sodium motion in heavily Na-loaded samples and is most likely attributed to short-distance jumps of sodium cations between sites within the same supercage.

arXiv comment2 pages, 1 figure, published in JPSJ

References in corpus (4)

• Stretched Exponential Relaxation Arising from a Continuous Sum of Exponential Decays
• NMR Observation of Rattling Phonons in the Pyrochlore Superconductor KOs2O6
• NMR study of thermally activated paramagnetism in metallic low-silica X zeolite filled with sodium atoms
• Evolution of the density of states at the Fermi level across the metal-to-insulator crossover in alkali doped zeolite

Cited by in corpus (1)

• Metallic State in Rubidium-Loaded Low-Silica X zeolite