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Superconductivity in bismuth-strontium-copper oxides

1988; American Physical Society; Volume: 38; Issue: 1 Linguagem: Inglês

10.1103/physrevb.38.754

1095-3795

J. P. Franck, J. Jung, W.A. Miner, M.A.-K. Mohamed,

Magnetic and transport properties of perovskites and related materials

We have observed superconductivity in Bi-Sr-Cu oxide near a nominal composition of ${\mathrm{Bi}}_{1.49}$${\mathrm{Sr}}_{1.68}$ ${\mathrm{Cu}}_{3.0}$${\mathrm{O}}_{7.05}$. Resistive transition temperatures ${T}_{c}^{R=0}$ vary between 3.5 and 5.4 K. The samples are crystallographically different from the presently known high-temperature superconductors.