Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure

P. V P S S Sastry; A. D. Robertson; A. R. West

doi:10.1016/0921-4534(95)00351-7

Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure

P. V P S S Sastry, A. D. Robertson, A. R. West^*

^*Corresponding author for this work

Research output: Contribution to journal › Article

11 Citations (Scopus)

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)_1.00O_3-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	https://doi.org/10.1016/0921-4534(95)00351-7
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

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AU - Robertson, A. D.

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AB - 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.

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10.1016/0921-4534(95)00351-7