Abstract
Stabilities of all three superconducting phases in the Bi-Sr-Ca-Cu-O system under high oxygen pressure were investigated over a wide range of temperatures. Only the 2201 phase is stable under high oxygen pressure; the 2212 and 2223 phases transform to a new orthorhombic perovskite-related phase of the GdFeO3 type. Its average composition is (Sr,Ca)0.75(Bi,Cu)1.00O3-δ with lattice parameters a=6.0082(7), b=8.3768(14) and c=5.8631(8) A ̊. This new phase is non-superconducting but readily reconverts to a superconducting 2212 phase when re-annealed in air.
| Original language | English |
|---|---|
| Pages (from-to) | 82-86 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 250 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1 Aug 1995 |
| Externally published | Yes |
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Sastry, P. V. P. S. S., Robertson, A. D., & West, A. R. (1995). Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure. Physica C: Superconductivity and its Applications, 250(1-2), 82-86. https://doi.org/10.1016/0921-4534(95)00351-7