TY - JOUR
T1 - Dependence of T c on the RE-ion size in (RE,Ca)Ba2Cu3O6
AU - Nakagawa, K.
AU - Sumino, Y.
AU - Chiba, H.
AU - Kim, K.
AU - Noji, Takashi
AU - Kato, M.
AU - Koike, Y.
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP15K06433.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/7/26
Y1 - 2018/7/26
N2 - Polycrystalline samples of RE 0.6Ca0.4Ba1.6Sr0.4Cu3O6 (RE = Nd, Gd, Dy, Y, Yb, Lu) without oxygen in the Cu(1)O chain have been prepared by the conventional solid-state reaction method. No superconductivity appears for larger RE = Nd, Gd, Dy, while superconductivity with T c ∼50 K appears for smaller RE = Y, Yb, Lu. This is presumably because holes produced by the Ca-substitution for RE are more supplied to the conductive Cu(2)O2 plane than to Cu(1) as the lattice becomes small. The maximum T c = 53 K for RE = Lu is considerably lower than 90 K for REBa2Cu3O7. This may be due to the low hole-concentration in the Cu(2)O2 plane.
AB - Polycrystalline samples of RE 0.6Ca0.4Ba1.6Sr0.4Cu3O6 (RE = Nd, Gd, Dy, Y, Yb, Lu) without oxygen in the Cu(1)O chain have been prepared by the conventional solid-state reaction method. No superconductivity appears for larger RE = Nd, Gd, Dy, while superconductivity with T c ∼50 K appears for smaller RE = Y, Yb, Lu. This is presumably because holes produced by the Ca-substitution for RE are more supplied to the conductive Cu(2)O2 plane than to Cu(1) as the lattice becomes small. The maximum T c = 53 K for RE = Lu is considerably lower than 90 K for REBa2Cu3O7. This may be due to the low hole-concentration in the Cu(2)O2 plane.
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U2 - 10.1088/1742-6596/1054/1/012011
DO - 10.1088/1742-6596/1054/1/012011
M3 - Conference article
AN - SCOPUS:85051355549
SN - 1742-6588
VL - 1054
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012011
T2 - 30th International Symposium on Superconductivity, ISS 2017
Y2 - 13 December 2017 through 15 December 2017
ER -