Abstract
Semiconducting samples of a Bi–Ca–Sr–Cu oxide, having a nominal composition 4:3:3:4, were prepared by melting high purity oxides of the various elements. Superconducting samples were obtained by annealing the semiconducting samples at a temperature close to the melting temperature. Electrical resistivity measurements indicated the presence of two superconducting phases, one with the onset temperature at about 110 K, the other with a significantly lower onset temperature. The presence of this second phase is proven by the x-ray powder diffraction patterns. The crystalline structures of both the semiconductor and superconductor samples have almost equal lattice parameters and are orthorhombic, but belong to different space groups: Fmmm and Bbmm, respectively. No significant amount of the 110 K superconducting phase was present in the diffraction pattern of the superconducting compound. XPS and XANES data on the Ca atom indicate that a different electronic state of Ca is present in the superconducting compound, which still contains an appreciable amount of the semiconducting phase.
Similar content being viewed by others
References
J.M. Tarascon, Y. LePage, P. Barboux, B. G. Bagley, L.H. Greene, W. R. McKinnon, G.W. Hull, M. Giroud, and D.M. Hwang, Phys. Rev. B 37, 9382 (1988).
S.A. Sunshine, T. Siegrist, L. F. Schneemeyer, D. W. Murphy, R.J. Cava, B. Batlogg, R. B. van Dover, R. M. Fleming, S.H. Glarum, S. Nakahara, R. Farrow, J. J. Krajewski, S.M. Zahurak, J.V. Waszczak, J.H. Marshall, P. Marsh, L.W. Rupp, Jr., and W.F. Peck, Phys. Rev. B 38, 893 (1988).
P. Bordet, J.J. Capponi, C. Chaillout, J. Chevanas, A.W. Hewat, E.A. Hewat, J. L. Hodeau, M. Marezio, J. L. Tholence, and D. Tranqui, Proc. Int. Conf. M2-HTSC, Interlaken, 1988, Physica C 153–155, 623 (1988).
F.U. Hillebrecht, J. Fraxedas, L. Ley, H.J. Trodahl, J. Zaanen, W. Braun, M. Mast, H. Petersen, M. Schaible, L. C. Bourne, P. Pinsukanjana, and A. Zettl, Phys. Rev. B 39, 236 (1989).
R. G. Geere, P.H. Gaskell, G. N. Greaves, J. Greengrass, and N. Binstead, in EXAFS and Near Edge Structure, edited by A. Bianconi, L. Incoccia, and S. Stipcich, Proc. Int. Conf., Frascati, Italy, September 1982 (Springer-Verlag, Berlin, 1983), p. 256.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Giardin, M.D., Feduzi, R., Manara, A. et al. An investigation of the crystalline and electronic structures of a 4:3:3:4 layered Bi–Ca–Sr–Cu oxide. Journal of Materials Research 6, 1838–1842 (1991). https://doi.org/10.1557/JMR.1991.1838
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1991.1838