TY - JOUR
T1 - Crystal structure and phase transition of PbBaSrYCu3Oy(y=7∼8.4
AU - Tokiwa, A.
AU - Oku, T.
AU - Nagoshi, M.
AU - Kikuchi, M.
AU - Hiraga, K.
AU - Syono, Y.
PY - 1989/12/1
Y1 - 1989/12/1
N2 - PbBaSrYCu3Oy prepared by slow cooling, oxygen annealing and quenching methods was studied by XPD, EPMA, HREM and TGA. From a high resolution electron microscopic investigation, the structure of PbBaSrYCu3O7 quenched from above 800°C was found to be a derivative of Pb2Sr2YCu3O8, in which one of the PbO layers in the PbO-Cu-PbO block was missing. The slowly cooled specimen with y{reversed tilde equals}8.2 lost 1.2 oxygen atoms above 580°C with an abrupt and reversible transition to PbBaSrYCu3O7. All of the slowly cooled, oxygen annealed and quenched specimens showed no superconductivity and behaved like a semiconductor.
AB - PbBaSrYCu3Oy prepared by slow cooling, oxygen annealing and quenching methods was studied by XPD, EPMA, HREM and TGA. From a high resolution electron microscopic investigation, the structure of PbBaSrYCu3O7 quenched from above 800°C was found to be a derivative of Pb2Sr2YCu3O8, in which one of the PbO layers in the PbO-Cu-PbO block was missing. The slowly cooled specimen with y{reversed tilde equals}8.2 lost 1.2 oxygen atoms above 580°C with an abrupt and reversible transition to PbBaSrYCu3O7. All of the slowly cooled, oxygen annealed and quenched specimens showed no superconductivity and behaved like a semiconductor.
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U2 - 10.1016/0921-4534(89)90083-X
DO - 10.1016/0921-4534(89)90083-X
M3 - Article
AN - SCOPUS:0024877748
SN - 0921-4534
VL - 161
SP - 459
EP - 467
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 4
ER -