A 109Ag solid state NMR study on (AgI)x(AgPO3)1-x glasses is reported. We demonstrate that, all over the glass formation region (0 < x < 0.6), the number of Ag carriers is nearly equal to the fraction of silver ions introduced by AgI. The dramatic conductivity changes from x=0.1 to x=0.5 (more than three orders-of-magnitude) are mainly due to changes of cations mobility. The role of AgI in affecting the transport properties of these glasses is discussed in terms of free volume, mixed oxygen-iodine coordination, and opening of percolative channels, in agreement with modified continuous random network model.
Tomasi, C., Magstris, A., Linati, L., Mustarelli, P. (2001). Carriers density and mobility in AgI:AgPO3 glasses: a NMR study. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 63(14) [10.1103/PhysRevB.63.144203].
Carriers density and mobility in AgI:AgPO3 glasses: a NMR study
Mustarelli, P
2001
Abstract
A 109Ag solid state NMR study on (AgI)x(AgPO3)1-x glasses is reported. We demonstrate that, all over the glass formation region (0 < x < 0.6), the number of Ag carriers is nearly equal to the fraction of silver ions introduced by AgI. The dramatic conductivity changes from x=0.1 to x=0.5 (more than three orders-of-magnitude) are mainly due to changes of cations mobility. The role of AgI in affecting the transport properties of these glasses is discussed in terms of free volume, mixed oxygen-iodine coordination, and opening of percolative channels, in agreement with modified continuous random network model.
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