Correlation of microscopic length scales of ion dynamics with network structure in lithium-iodide–doped lithium metaphosphate glasses
Department of Solid State Physics, Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032, India
Received: 10 September 2012
Accepted: 26 November 2012
In this paper we have studied the correlation of microscopic length scales of ion dynamics with the network structure in lithium-iodide–doped lithium metaphosphate glasses. We have obtained microscopic length scales for ion dynamics, such as the characteristic mean square displacement and the spatial extent of sub-diffusive motion of the lithium ions. We have observed that the lithium ions have to travel a smaller distance to overcome the nearest percolation barriers in order to perform long-range diffusion. The phosphate chain lengths shorten with the addition of lithium iodide to metaphosphate glasses. We have also studied the network structure of these glasses, and a correlation between the length scales of ion dynamics and the network structure has been obtained.
PACS: 61.43.Fs – Glasses / 77.22.Gm – Dielectric loss and relaxation
© EPLA, 2012