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Structural aspects of the superionic conduction mechanism in Ag-GeSe$$_{3}$$ glasses

Ag-GeSe$$_{3}$$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$$_x$$(GeSe$$_3$$)$$_{1-x}$$ with $$x>$$ 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 $$x>$$ 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.

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パーセンタイル:13.08

分野:Chemistry, Physical

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