Structural Study of Initial Growth of Nickel on Yttria-Stabilized Zirconia by Coaxial Impact-Collision Ion Scattering Spectroscopy

概要

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The atomic structure of yttria-stabilized ZrO2 (YSZ) surfaces was investigated by coaxial impact-collision ion scattering spectroscopy (CAICISS). After a simple treatment to clean the surface, the outermost plane of the clean YSZ (001) surface was found to be a Zr layer. Compared with the clean surface, the initial stage of Ni/YSZ interface formation was studied after the vapor deposition of nickel at room temperature in ultrahigh vacuum (UHV). It was revealed that Ni atoms grow in order even at a thickness of 2 monolayers (MLs) in UHV. The Ni growth conserved the 4-fold symmetry of the YSZ (001) substrate structure, suggesting a certain interaction between the Ni and Zr atoms. However, after air exposure, the ordering structure disappeared and changed into a random phase.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2005-04-15