TY - JOUR
T1 - Effects of extra oxygen on the physical properties in the Pb3201 phase of (Pb2Cu)Sr0.9La1.1CuO6+δ prepared by the polymerized complex method
AU - Kato, Masatsune
AU - Miyajima, Toyoo
AU - Sakuma, Atsushi
AU - Noji, Takashi
AU - Koike, Yoji
AU - Fujiwara, Akihiko
AU - Saito, Yoshitami
N1 - Funding Information:
The authors would like to thank M. Kakihana, Tokyo Institute of Technology, for his advice in the sample preparation by the polymerized complex method. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture, Japan. One of the authors (MK) was supported by a Grant-in-Aid from Yazaki Memorial Foundation for Science and Technology.
PY - 1995/3/20
Y1 - 1995/3/20
N2 - We have investigated the effects of extra oxygen on the crystal structure, transport properties and superconductivity in the Pb3201 phase of (Pb2Cu)Sr9La1.1CuO6+δ prepared by the polymerized complex method. A structural phase transition from orthorhombic to tetragonal phase is observed with increasing δ. The sample is orthorhombic for 0 ≲ δ ≲ 0.4, tetragonal for 1.7 ≲ δ ≲ 2 and a mixture of the orthorhombic and tetragonal phasse for 0.4 ≲ δ ≲ 1.7. In the orthorhombic phase of δ ≲ 0.3-0.4, Tc increases with increasing δ, owing to the increase of holes in the CuO2 sheets from the extra oxygen. In the tetragonal phase, on the other hand, the superconductivity disappears on account of the small hole concentration in the CuO2 sheets, owing to the increase of the Pb valence from +2 to +4.
AB - We have investigated the effects of extra oxygen on the crystal structure, transport properties and superconductivity in the Pb3201 phase of (Pb2Cu)Sr9La1.1CuO6+δ prepared by the polymerized complex method. A structural phase transition from orthorhombic to tetragonal phase is observed with increasing δ. The sample is orthorhombic for 0 ≲ δ ≲ 0.4, tetragonal for 1.7 ≲ δ ≲ 2 and a mixture of the orthorhombic and tetragonal phasse for 0.4 ≲ δ ≲ 1.7. In the orthorhombic phase of δ ≲ 0.3-0.4, Tc increases with increasing δ, owing to the increase of holes in the CuO2 sheets from the extra oxygen. In the tetragonal phase, on the other hand, the superconductivity disappears on account of the small hole concentration in the CuO2 sheets, owing to the increase of the Pb valence from +2 to +4.
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U2 - 10.1016/0921-4534(95)00062-3
DO - 10.1016/0921-4534(95)00062-3
M3 - Article
AN - SCOPUS:0029272606
VL - 244
SP - 263
EP - 270
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3-4
ER -