High-Tc superconducting phases in the series Bi2.1(Ca, Sr)n+lCunO2n+4+δ

  title={High-Tc superconducting phases in the series Bi2.1(Ca, Sr)n+lCunO2n+4+$\delta$},
  author={J. L. Tallon and Robert G. Buckley and P. W. Gilberd and Melinda Presland and Ian W. M. Brown and M. E. Bowden and L. A. Christian and Reiner Goguel},
Following the report of Maeda et al.1 on high-Tc superconductivity in samples of nominal composition BiSrCaCu2Ox we have identified three distinct phases in the homologous series Bi2.1(Ca, Sr)n+lCunO2n+4+δ with n = 1,2 and 3. These have zero resistance Tcs of 80 K, 91 K and 105 K respectively. The structures in the homologous series appear to be based on alternating double bismuth Bi2O2 layers and perovskite (Sr, Ca)O–CuO2 layers, with higher members obtained by intercalating additional 3.1… 

Solid‐Solution Ranges of the n= 2 and n= 3 Superconducting Phases in Bi2(SrxCa1 −x)n+1CunOy and the Effect on Tc

The cation solubility limits of the n= 2 and n= 3 superconducting phases in the Bi2(SrxCa1 −x)n+1CunOy system were established along tie lines with compatible phases via electron probe microanalysis

Single-phase Bi2+x(Ca,Sr) n+1 Cu n O2n+4+δ, n = 0, 1, 2, 3 AND ∞, and some substitutional DERIVATIVES

Abstract The preparation, structure and properties of five members of the homologous series Bi2+x(Ca,Sr) n+1 Cu n O2n+4+δ are discussed, namely for n = 0, 1, 2, 3 and ∞. The two end members are

A comparison of lead-doped Bi-Sr-Ca-Cu-O superconductors at the '2223' and '2234' compositions

Superconducting Bi-Pb-Sr-Ca-Cu-O ceramics have been prepared at the Bi1.2Pb0.8Sr2Ca2Cu3Ox (2223) and Bi1.6Pb0.4Sr2Ca3Cu4Oy (2234) compositions. The properties and microstructures after sintering in

Composition dependence of superconducting properties in Bi2(Sr1−xCax)n+1CunOy (n=2, 3) thin films

Thin films of the Bi2(Sr1−xCax)n+1CunOy (n=2, 3) system were prepared on (100)MgO substrates by coevaporation of Bi2O3, Sr‐Ca alloy, and Cu metal. The lattice constant of the c axis of the low Tc

Superconductivity in Bi-Sr-Ca-Cu-O (invited)

We report on the structure and superconducting properties of a single phase polycrystalline composition given by Bi2.2Sr1.7Ca1.2Cu2O8+δ as well as measurements on single crystals. X‐ray and electron

Preparation and characterization of superconducting phases in the Bi(Pb)‐Sr‐Ca‐Cu‐O system

The superconductive properties in the Bi(Pb)‐Sr‐Ca‐Cu‐O system with nominal composition of Bi2−x Pbx Sr2 Ca2 Cu3 Oy (x=0, 0.2, 0.4, and 0.6) and annealed at 860 °C for 240 h were studied using dc



A New High-Temperature Superconductor: Bi2Sr3-x Cax Cu2O8+y

A new superconductor that displays onset behavior near 120 K has been identified as Bi2Sr3-xCaxCu2O8+y, with x ranging from about 0.4 to 0.9, and electron microscopy studies show an incommensurate superstructure along the a axis that can be approximated by an increase of a factor of 5 over the subcell dimension.

Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O system

The discovery of 30-K superconductivity in the La–Ba–Cu–O system1 and 90-K superconductivity in the Y–Ba–Cu–O system2 stimulated a worldwide search for even higher-temperature superconductors.

Superconductivity in the high-Tc Bi-Ca-Sr-Cu-O system: Phase identification.

  • HazenPrewitt Chu
  • Materials Science
    Physical review letters
  • 1988
X-ray diffraction and electron microscopy data are consistent with a structure of alternating perovskite and Bi-Ca-Sr-Cu-O layers, which reveals a b-axis superstructure of 27.2 A, numerous stacking faults, and other defects.