Conference paper

Publication year: 1994

Pages: 1292-1299

Journal: Journal of Non-Crystalline Solids

Volume number: 172

ISSN: 0022-3093

DOI Link: https://doi.org/10.1016/0022-3093(94)90655-6

Conference: 2nd International Discussion Meeting on Relaxations in Complex Systems

Publisher: Elsevier

Abstract: 
The diffusion of ions in a structurally disordered lattice (percolation model), where the Coulomb interaction between the mobile ions is explicitely taken into account, is investigated by Monte Carlo simulations. It is shown that both the dispersion of the conductivity and the deviations of the spin-lattice relaxation rate from the Bloembergen-Purcell-Pound behaviour are caused by the interplay between structural disorder and long range Coulomb interaction. Specifically, it is shown that the characteristic quantities describing sigma(omega, T) and 1/T-1(omega, T)(exponents n(sigma),n(SLR), and relaxation times tau(sigma),tau(SLR)) show a different temperature dependence. When enhancing the disorder and approaching p,, a characteristic slowing of the spin-lattice relaxation time, tau(SLR), is observed, while the conductivity relaxation time, tau(sigma), remains practically unchanged.

Harvard Citation style: MEYER, M., MAASS, P. and BUNDE, A. (1994) CONDUCTIVITY AND SPIN-LATTICE RELAXATION IN DISORDERED IONIC CONDUCTORS, Journal of Non-Crystalline Solids, 172, pp. 1292-1299. https://doi.org/10.1016/0022-3093(94)90655-6

APA Citation style: MEYER, M., MAASS, P., & BUNDE, A. (1994). CONDUCTIVITY AND SPIN-LATTICE RELAXATION IN DISORDERED IONIC CONDUCTORS. Journal of Non-Crystalline Solids. 172, 1292-1299. https://doi.org/10.1016/0022-3093(94)90655-6