Detection of oxygen deficient regions in yba2cu3 ox superconductors by polarized optical microscopy

Masato Murakami, Masashi Yoshida, Hiroyuki Fujimoto, Satoshi Gotoh, Naoki Koshizuka, Shoji Tanaka

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We have found that oxygen deficient regions in YBa2Cu3Ox superconductors exhibit different colors from that of the matrix under polarized light. When oxygen annealing was insufficient, large melt-grown YBaCuO crystals occasionally contained narrow bands exhibiting different colors where the twin structure was absent. Upon annealing in oxygen at­mosphere, these banded regions disappeared, indicating that these regions are oxygen deficient. Raman spectroscopy measurements also confirmed that such regions are oxygen deficient.

Original languageEnglish
Pages (from-to)L796-L797
JournalJapanese Journal of Applied Physics
Issue number5
Publication statusPublished - 1991 May
Externally publishedYes


  • Color
  • Oxygen deficiency
  • Polarized optical microscopy
  • Raman spectroscopy
  • YBacuo

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


Dive into the research topics of 'Detection of oxygen deficient regions in yba<sub>2</sub>cu<sub>3</sub> o<sub>x</sub> superconductors by polarized optical microscopy'. Together they form a unique fingerprint.

Cite this