Proton conduction in thin film yttrium-doped barium zirconate

Joon Hyung Shim, Turgut M. Gür, Fritz B. Prinz

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63 Citations (Scopus)


The proton conductivity of yttrium-doped barium zirconate (BYZ) films epitaxially grown on MgO(100) has been studied in the range of 140-290 °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.

Original languageEnglish
Article number253115
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 2008
Externally publishedYes

Bibliographical note

Funding Information:
Financial support from ONR (Grant No. 1031010-2-TDAGP) and ONR-MURI (Grant No. 1111078-1-SXCAP) programs are gratefully acknowledged. We also acknowledge the Global Climate and Energy Project (GCEP) for support on exploration studies. We thank Professor J. Schoonman of Delft University of Technology (The Netherlands) for critically reading the manuscript. We are grateful to Dr. Gertjan Koster (now with the University of Twente in The Netherlands) for his assistance and collaboration on the PLD work. We also thank Joon Seok Park and Wonyoung Lee for their assistance with TEM and AFM analyses, respectively.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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