Search for new superconducting oxides in M4Pn2O phases (M = Ca, Sr, Ba and Pn = As, Sb, Bi)

C. Artini, M. M. Carnasciali, G. A. Costa, E. Magnone, P. Mele

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

All the high-Tc oxide superconducors known to date are copper-based oxides (cuprates) in the layered perovskite crystal structures that contain a planar network of copper and oxygen (CuO2 plane). In searching for possible new superconducting metal oxides without Cu ions, we have examined the layered tetragonal pnictides M4Pn2O (M = Ca, Sr, Ba and Pn = As, Sb, Bi) because their structures are considered as an anti-perovskite with alternate stacking of two kinds of layers; conducting M2Pn2 block layers sandwiched by insulating perovskite-based M2O layers. Compounds were prepared by melting stoichiometric amounts of the components in tantalum tube all sealed under an argon atmosphere. The samples have been characterised by scanning electron microscopy, powder X-ray diffraction (XRD), metallographic examination and electrical resistivity. For these stoichiometric compounds no superconductive transition is observed.

Original languageEnglish
Pages (from-to)1266-1269
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume372-376
Issue numberPART 2
DOIs
Publication statusPublished - 2002 Aug 1

Keywords

  • Anti-perovskite oxide
  • HTS multilayers
  • Pnictides
  • Synthesis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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