Raman Scattering from Co-substituted YBa2Cu3-xCoxO6+y Superconductors

Hirotaka Fujimori, Masato Kakihana, Masatomo Yashima, Masahiro Yoshimura, Hiromasa Mazaki, Hiroshi Yasuoka

Research output: Contribution to journalArticle

Abstract

A systematic Micro-Raman spectroscopic investigation has been performed on YBa2Cu3-xCoxO6+y ceramic samples of different Co content x in the interval 0≤x≤1 which are prepared by a polymerized complex method. With increasing Co content an evolution of the defect induced Raman scattering of the CuO chain modes (550-650 cm-1 region) has been observed. The intensity of the defect modes has increased with increasing Co concentration, which has in turn suggested increased disordering of oxygen in the based (Cu/Co)-Oy plane. It has been infered from Raman spectroscopic results that the CuO chain disorder is closely related to Tc and a certain minimal size of the oxygen disordered (or ordered) domain is needed for a decrease in Tc (or the appearance of superconductivity).

Original languageEnglish
Pages (from-to)792-797
Number of pages6
Journaljournal of the japan society of powder and powder metallurgy
Volume42
Issue number7
DOIs
Publication statusPublished - 1995 Jan 1
Externally publishedYes

Keywords

  • Raman scattering
  • YBaCuCoO
  • oxygen disorder
  • superconductor

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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    Fujimori, H., Kakihana, M., Yashima, M., Yoshimura, M., Mazaki, H., & Yasuoka, H. (1995). Raman Scattering from Co-substituted YBa2Cu3-xCoxO6+y Superconductors. journal of the japan society of powder and powder metallurgy, 42(7), 792-797. https://doi.org/10.2497/jjspm.42.792