TY - JOUR
T1 - Normal and superconducting properties of Pb2Sr2Y1-xCaxCu3O8+δ. II. Dependence on the oxygen concentration
AU - Koike, Yoji
AU - Sunagawa, Hiromu
AU - Noji, Takashi
AU - Masuzawa, Masahiro
AU - Kobayashi, Norio
AU - Namiki, Michiko
AU - Hirokawa, Kichinosuke
AU - Saito, Yoshitami
N1 - Funding Information:
The authors would like to thank Dr. T. Goto for his aid in the data analysis. They are also grateful to Professor Y. Muto for his continuous encouragement. This work was supported by a Grant-in-Aid for Scientific Research on Priority Areas, "Mechanism of Superconductivity", from the Ministry of Education, Science and Culture, Japan.
PY - 1990/11/1
Y1 - 1990/11/1
N2 - The dependence on the oxygen concentration of normal and superconducting properties of ceramic samples of Pb2Sr2Y1-xCaxCu3O8+δ has been investigated in the composition range of 0≤x≤0.5 and 0≤δ<2. The superconductivity in each sample with different x is suppressed with increasing δ, which is in good correspondence to the increase in resistivity and Hall coefficient with increasing δ, but is contradictory to the speculation by Ohta and Maekawa [Phys. Rev. B41 (1990) 6524]. It is found from chemical analysis that holes introduced by the extra oxygen first enter the CuOδ layer and then the PbO layer rather than the pyramidal CuO2 layer. With increasing δ, a structural phase transition from the orthorhombic phase to the tetragonal phase is observed at δ∼1 in every sample with different x. The dependence on the oxygen concentration of the magnetic susceptibility is also reported.
AB - The dependence on the oxygen concentration of normal and superconducting properties of ceramic samples of Pb2Sr2Y1-xCaxCu3O8+δ has been investigated in the composition range of 0≤x≤0.5 and 0≤δ<2. The superconductivity in each sample with different x is suppressed with increasing δ, which is in good correspondence to the increase in resistivity and Hall coefficient with increasing δ, but is contradictory to the speculation by Ohta and Maekawa [Phys. Rev. B41 (1990) 6524]. It is found from chemical analysis that holes introduced by the extra oxygen first enter the CuOδ layer and then the PbO layer rather than the pyramidal CuO2 layer. With increasing δ, a structural phase transition from the orthorhombic phase to the tetragonal phase is observed at δ∼1 in every sample with different x. The dependence on the oxygen concentration of the magnetic susceptibility is also reported.
UR - http://www.scopus.com/inward/record.url?scp=0025517205&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025517205&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(90)90149-9
DO - 10.1016/0921-4534(90)90149-9
M3 - Article
AN - SCOPUS:0025517205
SN - 0921-4534
VL - 171
SP - 331
EP - 338
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 3-4
ER -