Indication of Meissner Effect in Sulfur-Substituted Strontium Ruthenates

Armen Gulian; Vahan Nikoghosyan

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arXiv · 1109.5385

Indication of Meissner Effect in Sulfur-Substituted Strontium Ruthenates

Armen Gulian·Vahan Nikoghosyan

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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.

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Armen Gulian, Vahan Nikoghosyan. 2011-09-25. Indication of Meissner Effect in Sulfur-Substituted Strontium Ruthenates. https://arxiv.org/abs/1109.5385

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