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Location of proton and structural relaxation in a perovskite-type proton conductor

Shimoyama, Tomotaka*; Tojo, Takeo*; Kawaji, Hitoshi*; Atake, Toru*; Fukazawa, Hiroshi; Igawa, Naoki 

Proton conductor BaZr$$_{0.8}$$Sc$$_{0.2}$$O$$_{2.9}$$ was synthesized by a solid state reaction method. Neutron diffraction experiments were performed for dried and D$$_{2}$$O dissolute samples at 10 K. The observed data were analyzed by Rietveld method and Maximum Entropy method. It has been clarified that the deuterium exits at 12${it h}$ site. It is founded that the distance between oxide ion site and deuterium site is shorter than the normal distance of O-D.

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