Raman scattering studies of YBa2Cu3O7−x thin films grown by chemical vapor deposition and metal-organic deposition

• Published in: Physica. C, Superconductivity Vol. 463-465; pp. 732 - 735
• Main Authors: Lee, E., Yoon, S., Um, Y.M., Jo, W., Seo, C.W., Cheong, H., Kim, B.J., Lee, H.G., Hong, G.W.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2007; Elsevier Science
• Subjects: Chemical vapor deposition; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; High-tc films; Metal-organic deposition; Phonons; Physics; Properties of type I and type II superconductors; Raman scattering; Superconducting films and low-dimensional structures; Superconductivity; YBCO films; 74.78.Bz; 84.71.Mn; YBCO films; Raman scattering; Metal-organic deposition; Chemical vapor deposition; Superconducting thin films; Raman spectra; XRD; Texture; Nonstoichiometry; Optimization; CVD; Optical phonons; 74.78.Bz; 84.71.Mn; YBCO films; Raman scattering; Chemical vapor deposition; Metal-organic deposition; Barium oxides; Phonon mode; High-Tc superconductors; Microstructure; Copper oxides; Yttrium oxides
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2007.01.065

We present results of Raman scattering studies of superconducting YBa2Cu3O7−x(YBCO) films grown by chemical vapor deposition and metal-organic deposition methods. It is shown by X-ray diffraction that all the as-grown YBCO films have a highly c-axis oriented and in-plane aligned texture. Raman scattering measurements were used to investigate optical phonon modes, oxygen contents, structural properties, and second-phases of the YBCO coated conductors. Raman spectra of YBCO films with lower-transport qualities exhibit additional phonon modes at ∼300cm−1, ∼600cm−1, and ∼630cm−1, which are related to second-phases such as Ba2Cu3O5.9 and BaCuO2. Our results strongly suggest that Raman scattering be useful for optimizing YBCO film growth conditions.