Origin of FSDP in superionic AgI–Ag 2O–V 2O 5 glasses

• Published in: Solid state ionics Vol. 168; no. 1; pp. 93 - 98
• Main Authors: Takahashi, H., Rikitake, N., Sakuma, T., Ishii, Y.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2004
• Subjects: Elastic neutron scattering; First sharp diffraction peak; Glass; Medium range order; 61.12.−q; First sharp diffraction peak; Glass; Elastic neutron scattering; Medium range order; 61.43.Fs
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/j.ssi.2003.12.026

FSDP measurements were performed by X-ray diffraction, neutron diffraction and elastic neutron scattering experiments for AgI–Ag 2O–V 2O 5 and some of AgBr–Ag 2O–V 2O 5, AgCl–Ag 2O–V 2O 5 and AgI–AgPO 3 glasses at room temperature. FSDP observed by X-ray diffraction is due to the density fluctuation of the network structure. Composition change of this FSDP profile for AgI–Ag 2O–V 2O 5 glasses corresponds to those of the ionic conductivity and the molar volume. New FSDP was found in the high AgI region of AgI–Ag 2O–V 2O 5 system by elastic neutron scattering. FSDP observed by neutron scattering suggests the formation of medium range order of doped AgI in highly AgI-doped glasses.