TY - JOUR
T1 - Superconductivity in (Pb/Cu)-"1222" copper oxides
AU - Sakai, Naomichi
AU - Maeda, Toshihiko
AU - Yamauchi, H.
AU - Tanaka, Shoji
N1 - Funding Information:
We would like to thank K. Sakuyama and Y. Yae-gashi of Tohoku Electric Power Co., Ltd., and T. Ka-neko of Sumitomo Electric Co., Ltd., for their helpful discussion. This work was partially supported by NEDO.
PY - 1993/7/1
Y1 - 1993/7/1
N2 - The superconductivity in (Pb/Cu)-"1222" cuprates, (Pb, Cu) (Sr, Ln)2(Ln, Ce)2Cu2Oz (Ln=Sm, Eu, Gd, Dy and Ho), has been found to be strongly dependent on the oxygen content as well as on the species of Ln ion. While the samples with Ln=Sm, Eu, Gd and Dy prepared in O2 at an ambient pressure exhibit superconductivity, those with Ln=Ho required post-annealing in O2 of a high pressure to become superconductors. It was likely that the ionic radius of Ln3+ and oxygen stoichiometry were strongly related to each other and both played important roles in the occurrence of superconductivity in the (Pb/Cu)-"1222" compounds.
AB - The superconductivity in (Pb/Cu)-"1222" cuprates, (Pb, Cu) (Sr, Ln)2(Ln, Ce)2Cu2Oz (Ln=Sm, Eu, Gd, Dy and Ho), has been found to be strongly dependent on the oxygen content as well as on the species of Ln ion. While the samples with Ln=Sm, Eu, Gd and Dy prepared in O2 at an ambient pressure exhibit superconductivity, those with Ln=Ho required post-annealing in O2 of a high pressure to become superconductors. It was likely that the ionic radius of Ln3+ and oxygen stoichiometry were strongly related to each other and both played important roles in the occurrence of superconductivity in the (Pb/Cu)-"1222" compounds.
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U2 - 10.1016/0921-4534(93)90487-B
DO - 10.1016/0921-4534(93)90487-B
M3 - Article
AN - SCOPUS:0027625262
VL - 212
SP - 75
EP - 80
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -