Origin of the 110-K superconducting transition in the Bi-Sr-Ca-Cu-O system
- 1 August 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (4), 2504-2508
- https://doi.org/10.1103/physrevb.38.2504
Abstract
Superconducting critical transitions with an onset at 112 K and zero resistance at 107 K are obtained within the Bi-Sr-Ca-Cu-O system. The synthesis and formation of the 110-K superconducting phase using the 85-K material as a precursor is explained. The 110-K phase grows from the 85-K phase such that the resulting faceted crystal (a pseudomorph) can contain some of the 85-K phase in the core. With such a microstructure our magnetic data can be simply explained. A major structural difference between the 85- and 110-K materials is that the 85-K material can grow (relatively) large single crystals having long-range order whereas the 110-K material has only intermediate-range order (cryptocrystalline) of about 100-200 Å.Keywords
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