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.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2021 Jul 30|
|Event||33rd International Symposium on Superconductivity, ISS 2020 - Tsukuba, Japan|
Duration: 2020 Dec 1 → 2020 Dec 3
ASJC Scopus subject areas
- Physics and Astronomy(all)