Indication of Meissner Effect in Sulfur-Substituted Strontium Ruthenates

Armen Gulian; Vahan Nikoghosyan

Indication of Meissner Effect in Sulfur-Substituted Strontium Ruthenates

Superconductivity 2011-09-27 v1 Chemical Physics

Authors: Armen Gulian , Vahan Nikoghosyan

Abstract

Ceramic samples of Sr2RuO(4-y)Sy (y=0.03-1.2) with intended isovalent substitution of oxygen by sulfur have been synthesized and explored in the temperature range 4-300K. It is found that at a range of optimum sulfur substitution the magnetic response of ceramic samples reveals large diamagnetic signal with amplitudes approaching comparability with that of the YBCO-superconductors. Contrary to a pure ceramic Sr2RuO4, if properly optimized, the resistivity of sulfur-substituted samples has a metallic behavior except at lower temperatures where an upturn occurs. Both synthesis conditions and results of measurements are reported. The Meissner effect may point to high-temperature superconductivity.

Keywords

strontium ruthenate sulfur substitution Meissner effect diamagnetic signal high-temperature superconductivity ceramic samples

Cite

@article{arxiv.1109.5385,
  title  = {Indication of Meissner Effect in Sulfur-Substituted Strontium Ruthenates},
  author = {Armen Gulian and Vahan Nikoghosyan},
  journal= {arXiv preprint arXiv:1109.5385},
  year   = {2011}
}

Comments

4 pages, 2 figures

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