TY - JOUR
T1 - Ag K-edge EXAFS of AgI-alkylammonium iodide glasses
AU - Kawamura, Junichi
AU - Itoigawa, Hiroyuki
AU - Kamiyama, Takashi
AU - Nakamura, Yoshio
N1 - Funding Information:
The authors thank to Professor Kenji Suzuki and Dr Masaki Sakurai of Institute of Material Research, Tohoku University for their helpful discussions. These experiments were performed in PF Station BL-10B in the Institute of High Energy Physics, Tsukuba (95G025). This work is partly supported by a Scientific Research Grant (#05640432), and Grant-in-Aid for Scientific Research on Priority Areas (No.260) from The Ministry of Education, Science, Sports and Culture. It is also supported by the Foundation for Promotion of Material Science and Technology of Japan.
PY - 1999/6
Y1 - 1999/6
N2 - Ag K-edge EXAFS of organic-inorganic mixed ionic conductor glasses of AgI-alkylammonium iodides were measured by varying their compositions. Although their conductivity varies from superionic conductors to insulators through a percolation threshold, no significant change was seen in local structure around mobile Ag+ ions. From a cumulant analysis of the EXAFS data, the nearest neighbor distance between Ag+ and I- is estimated to be 2.79 angstroms and the coordination number is 4.5±0.5 irrespective of the compositions. From these results, it is concluded that the transition from superionic conductor to insulator is not due to the change in local structures but by their intermediate range structure such as connectivity of percolation networks.
AB - Ag K-edge EXAFS of organic-inorganic mixed ionic conductor glasses of AgI-alkylammonium iodides were measured by varying their compositions. Although their conductivity varies from superionic conductors to insulators through a percolation threshold, no significant change was seen in local structure around mobile Ag+ ions. From a cumulant analysis of the EXAFS data, the nearest neighbor distance between Ag+ and I- is estimated to be 2.79 angstroms and the coordination number is 4.5±0.5 irrespective of the compositions. From these results, it is concluded that the transition from superionic conductor to insulator is not due to the change in local structures but by their intermediate range structure such as connectivity of percolation networks.
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U2 - 10.1016/S0167-2738(98)00427-5
DO - 10.1016/S0167-2738(98)00427-5
M3 - Conference article
AN - SCOPUS:0032672022
SN - 0167-2738
VL - 121
SP - 37
EP - 41
JO - Solid State Ionics
JF - Solid State Ionics
IS - 1
T2 - Proceedings of the 1997 11th International Conference on Solid State Ionics, SSI-97
Y2 - 16 November 1997 through 21 November 1997
ER -