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Yanyi Zhang,Feng Feng,Huang Rongxia,Kai Shi,Shaozhu Xiao,WeiWu,Timing Qu,Xiaohao Wang,Zhenghe Han 한국물리학회 2014 Current Applied Physics Vol.14 No.3
Cerium dioxide (CeO2) films were fabricated on yttria-stabilized zirconia (YSZ) single crystals using unbalanced radio frequency (RF) magnetron sputtering. X-ray diffraction measurements revealed film strain discrepancies under different deposition parameters. Strain evolution was induced by varying sputtering pressure, RF power, and sputtering gas. A distinct morphological transition from a granular surface to an interwoven surface was also realized by varying the above parameters. On the basis of the “atomic peening” mechanism, the influence of different parameters on film strainwas discussed. The film surface characteristics were revealed to be highly correlated with film strain. YBa2Cu3O7d (YBCO) films were post-deposited on the as-grown CeO2/YSZ(001) stack by using the trifluoroacetate metal-organic deposition (TFA-MOD) method. The superconducting property of the YBCO layer varied significantly with the morphology of the CeO2 buffer films.