Electron energy loss spectroscopy on oxygen k-edge fine structure of YBa2Cu3Oycontaining dopants (La, Ca, Co)

Daisuke Shindo, Kenji Hiraga, Ayako Tokiwa, Takeshi Soga, Kiichi Hojou, Shigemi Furuno, Hitoshi Otsu, Satoru Nakajima, Makoto Hirabayashi, Masae Kikuchi, Yasuhiko Syono

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2 Citations (Scopus)

Abstract

The fine structures of the oxygen K-edge in the Y-Ba-Cu-O system, in which hole content was controlled by reducing the oxygen content and doping elements (La, Ca and Co), were investigated by electron energy loss spectroscopy (EELS). When Ba(+2)and Y(+3) were replaced by La(+3) and Ca(+2), respectively, the oxygen content of the sample changed and the peak corresponding to the hole state near the Fermi energy sensitively changed with the average hole content. When Cu(+2) was replaced by Co(+3), Tc decreased drastically and the peak at the oxygen K-edge shifted to higher energy.

Original languageEnglish
Pages (from-to)L1197-L1200
JournalJapanese journal of applied physics
Volume28
Issue number7 A
DOIs
Publication statusPublished - 1989 Jul

Keywords

  • Electron energy loss spectroscopy
  • High-T superconductor
  • Hole concentration
  • Near-edge fine structure
  • Oxygen K edge
  • Y-Ba-Cu-O

ASJC Scopus subject areas

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

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    Shindo, D., Hiraga, K., Tokiwa, A., Soga, T., Hojou, K., Furuno, S., Otsu, H., Nakajima, S., Hirabayashi, M., Kikuchi, M., & Syono, Y. (1989). Electron energy loss spectroscopy on oxygen k-edge fine structure of YBa2Cu3Oycontaining dopants (La, Ca, Co). Japanese journal of applied physics, 28(7 A), L1197-L1200. https://doi.org/10.1143/JJAP.28.L1197