研究目的
Investigating the distribution of Zr in solution-derived BaZrO3 - YBa2Cu3O7-δ epitaxial thin films and its effects on superconducting properties.
研究成果
XPS combined with Ar+ ion etching effectively determined Zr distribution in YBCO films, revealing Zr segregation near the surface and diffusion into the substrate. The formation of Y-Ti-O phases due to Ti diffusion was identified, impacting superconducting properties.
研究不足
The study is limited by the effects of Ar+ ion sputtering on film stoichiometry and the potential for inhomogeneous Zr distribution affecting superconducting properties.
1：Experimental Design and Method Selection
YBCO and YBCO-BZO films were deposited from precursor solutions spin-coated on SrTiO3 [001] single crystals, followed by pyrolysis and heating to form superconducting films.
2：Sample Selection and Data Sources
Samples included pristine YBCO and YBCO with 5 and 10 mol% BZO additions, characterized by XRD, SEM, and XPS.
3：List of Experimental Equipment and Materials
Rigaku SmartLab for XRD, SEM for surface morphology, XPS with AlKα and MgKα sources for chemical analysis, ICP-MS for metal concentration measurement.
4：Experimental Procedures and Operational Workflow
Films were pyrolyzed and heated under controlled conditions, followed by structural and chemical characterization using XRD, SEM, and XPS.
5：Data Analysis Methods
XPS data were analyzed for Zr/Y ratio and depth profile, XRD for structural properties, and SEM for surface morphology.
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