Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2947584
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The proton conductivity of yttrium-doped barium zirconate (BYZ) films epitaxially grown on MgO(100) has been studied in the range of 140-290 degrees C as a function of film thickness (60-670 nm) in relation to their crystal and morphological structure at the nanoscale. Highly textured 60 nm BYZ film epitaxially grown on MgO(100) showed high ionic conductivity, close to its bulk value. In contrast, thicker polycrystalline samples with rougher surfaces, caused by grain boundary formation, exhibited lower conductivity. (C) 2008 American Institute of Physics.
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