Structural aspects of the superionic conduction mechanism in Ag-GeSe glasses

Ag-GeSeガラスにおける超イオン伝導機構の構造的特徴

Stellhorn, J. R.*; 細川 伸也*; Pilgrim, W.-C.*; 川北 至信  ; 上村 健二*; 木村 耕治*; Blanc, N.*; Boudet, N.*

Stellhorn, J. R.*; Hosokawa, Shinya*; Pilgrim, W.-C.*; Kawakita, Yukinobu; Kamimura, Kenji*; Kimura, Koji*; Blanc, N.*; Boudet, N.*

The local and intemediate-range atomic structure in the Ag ion conduction glasses Ag(GeSe) with 0.15 and 0.50 has been investigated by Anormalous X-Ray Scattering experiments at the K absorption edges of each constituent element. This method can provide insight into the structural properties enableing the effect of superionic conductivity for compositions with 0.33 in the amorphous phase. The experimental results were analyzed with Reverse Monte Carlo modeling, providing the partial structure factors and the corresponding partial pair-distribution functions. Evidence is found for a high level of intermediate range order for low silver concentrations, whereas the superionic conducting phase formed at high silver concentrations is characterized by cluster-like configurations of Ag atoms on a nanometer scale.