Proton Transport and Microstructure Properties in Superlattice Thin Films Fabricated by Pulsed Laser Deposition

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概要

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• Superlattice thin films of the perovskite-type oxide proton conductor SrZr0.95Y0.05O3/SrTiO3 was fabricated by pulsed laser deposition. Their structural and proton transport properties were reported. X-ray diffraction analysis and selected area electron diffraction revealed that the thin films were epitaxially grown on MgO(001) substrate. High-density edge dislocations and a columnar structure were observed in the films by high-resolution electron microscopy. The in-plane electrical conductivity of the thin films was determined by impedance spectroscopy. The contribution of proton transport to the total conductivity of the films was confirmed by H2O/D2O exchange measurement. The conductivity of superlattice films was increased by introducing heterointerfaces. The high activation energy ($E_{\text{a}}=1.0$ eV) was explained by the grain-boundary effect of the columnar structure in the films.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2005-12-15

著者

• Tsurui Takao

  Institute For Materials Research Tohoku University

• Sata Noriko

  Department Of Chemistry Faculty Of Science And Technology Keio University

• Yugami Hiroo

  Department Of Mechanical Systems And Design Graduate School Of Engineering Tohoku University

• Kuwata Naoaki

  Department Of Mechanical Systems And Design Graduate School Of Engineering Tohoku University

• Sata Noriko

  Department of Mechanical Systems and Design, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-Aoba, Sendai 980-8579, Japan

• Yugami Hiroo

  Department of Mechanical Systems and Design, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-Aoba, Sendai 980-8579, Japan

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