Effect of co-substitution on superconductivity in (Y, Ca)(Ba, Sr)2Cu4O8prepared by the molten KOH method

A. Imigi, T. Kawamata, Takashi Noji, M. Kato

Research output: Contribution to journalConference articlepeer-review


Effect of co-substitution of Ca and Sr in the Y-124 phase of Y1-x CaxBa2-y Sr y Cu4O8 has been investigated. Polycrystalline samples of Y1-x CaxBa2-y Sr y Cu4O8 with 0 ≤ x(Ca) ≤ 0.2 and 0 ≤ y(Sr) ≤ 0.2 have been prepared by the molten KOH method. The lattice parameters decrease with increasing y(Sr), indicating that the smaller Sr ions are systematically substituted for the larger Ba ions. The value of Tc increases from 83 K to ∼ 90 K through the Sr-substitution for x(Ca) = 0, while Tc ∼ 90 K are almost independent of y(Sr) for x(Ca) = 0.1 and 0.2.

Original languageEnglish
Article number012006
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2021 Jul 30
Event33rd International Symposium on Superconductivity, ISS 2020 - Tsukuba, Japan
Duration: 2020 Dec 12020 Dec 3

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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