Structure of proton conductor Ce $_{1-x}$ La $_{x}$ O $_{2-x/2}$ studied by PDF analysis and MEM

Saruwatari, Koji*; Nagasaki, Takanori*; Kodama, Katsuaki ; Igawa, Naoki ; Ishigaki, Toru*

The average and local structures of Ce $_{1-x}$ La $_{x}$ O $_{2-x/2}$ which is one of the excellent proton conductors were analyzed by using the Rietveld/ Maximum Entropy Method (MEM) and the Atomic Pair Distribution Function (PDF) analysis method with the neutron diffraction. The lattice parameter of hydrogen doped Ce $_{1-x}$ La $_{x}$ O $_{2-x/2}$ is larger than those of undoped sample. This result is caused by the effect of hydrogen doping. The peaks of the PDF profiles were slightly wider than those of normal crystals. This phenomenon shows the local disorder exists in the samples. In this work, the relationship between the average and local structures of hydrogen doped and undoped Ce $_{1-x}$ La $_{x}$ O $_{2-x/2}$ will be discussed.

Language	:	Japanese
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Meeting title	:	日本中性子科学会第16回年会(JSNS 2016)
Held date	:	2016/12
Location (city)	:	名古屋
Location (country)	:	日本
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Keywords	:	no keyword
Research Facility	:	J-PARC物質・生命科学実験施設
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Registration No. : BB20161480
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Structure of proton conductor CeLaO studied by PDF analysis and MEM

Structure of proton conductor Ce $_{1-x}$ La $_{x}$ O $_{2-x/2}$ studied by PDF analysis and MEM