Double transition in calcium-123 (CaSr 2Cu 3O y) superconductor

The Ca 2+ is successfully substituted for the 3+ rare earth element in the 123 ceramic structure. A double phase transition is observed in oxygen deficient samples. A superconducting transition onset occurs at 90 K, and all resistivity vanishes at 73 K. However, at a lower temperature of 50 K the sa...

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Bibliographic Details
Published in:Solid state communications 1990, Vol.76 (12), p.1357-1360
Main Authors: Fei, Xin, Lu, D.F., Sun, G.F., Wong, K.W., Chan, F.T., Sheng, Z.Z., Xin, Ying, Fung, P.C.W., Lam, C.C., Ching, W.Y., Xu, Y.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Properties of type I and type II superconductors
Superconductivity
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Summary:The Ca 2+ is successfully substituted for the 3+ rare earth element in the 123 ceramic structure. A double phase transition is observed in oxygen deficient samples. A superconducting transition onset occurs at 90 K, and all resistivity vanishes at 73 K. However, at a lower temperature of 50 K the sample exhibits a superconducting to insulating transition. The double transition in R-T is accompanied by a corresponding double magnetic transition in χ- T.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(90)90385-O