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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Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure. / Sastry, P. V P S S; Robertson, A. D.; West, A. R.
In: Physica C: Superconductivity and its Applications, Vol. 250, No. 1-2, 01.08.1995, p. 82-86.Research output: Contribution to journal › Article
TY - JOUR
T1 - Instability of Bi-Sr-Ca-Cu-O superconductors under high oxygen pressure
AU - Sastry, P. V P S S
AU - Robertson, A. D.
AU - West, A. R.
PY - 1995/8/1
Y1 - 1995/8/1
N2 - 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.
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.
U2 - 10.1016/0921-4534(95)00351-7
DO - 10.1016/0921-4534(95)00351-7
M3 - Article
AN - SCOPUS:0029357445
VL - 250
SP - 82
EP - 86
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -