TY  - JOUR
AU  - Koettgen, Julius
AU  - Dück, Gerald
AU  - Martin, Manfred
TI  - The oxygen ion conductivity of Lu doped ceria
JO  - Journal of physics / Condensed matter
VL  - 32
IS  - 26
SN  - 1361-648X
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2020-03858
SP  - 265402 -
PY  - 2020
AB  - The oxygen ion conductivity of polycrystalline samples of Lu doped ceria is studied using impedance spectroscopy. Lutetium doped ceria is of particular interest as Lu has a similar ionic radius as the host cation Ce. The change of the ionic conductivity as a function of the Lu dopant fraction is investigated in detail revealing a similar behavior as Sm doped ceria that has one of the highest ionic conductivity in ternary cerium oxides. In comparison with simulations, the experimental dependence of the conductivity on the dopant fraction reveals that migration barriers for oxygen vacancy jumps around Lu ions are slightly higher than for jumps in pure ceria. The absolute conductivity is small due to the strong trapping of oxygen vacancies near Lu dopants.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1088/1361-648X/ab7d64
UR  - https://juser.fz-juelich.de/record/885475
ER  -