Superconductivity in Ru-substituted polycrystallineBaFe2−xRuxAs2

2009/02/28 by Shilpam Sharma, A. Bharathi, Sharat Chandra +7 · 1 citation
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paper · pdf · doi:10.1103/physrevb.81.174512

published as Phys. Rev B, vol 81, 174512 (2010) · 20 pages 10 figures

openalex publication_date 2010/05/12 · arxiv created 2010/08/06 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The occurrence of bulk superconductivity at \ensuremath∼22 K is reported in polycrystalline samples of BaFe_2\ensuremath-xRu_xAs₂ for nominal Ru content in the range of x=0.75--1.125. A systematic suppression of the spin-density-wave transition temperature (T_SDW) precedes the appearance of superconductivity in the system. A phase diagram is proposed based on the measured T_SDW and superconducting transition temperature (T_C) variations as a function of Ru composition. Band-structure calculations indicate introduction of electron carriers in the system upon Ru substitution. The calculated magnetic moment on Fe shows a minimum at x=1.0, suggesting that the suppression of the magnetic moment is associated with the emergence of superconductivity. Results of low-temperature and high-field M"ossbauer measurements are presented. These indicate weakening of magnetic interaction with Ru substitution.

Citations

• Measurement and analysis of the Hall effect of A-Fe₂As₂ single crystals with A = Ba, Ca or Sr
• Superconducting Fe-Based Compounds(A1−xSrx)Fe2As2withA=Kand Cs with Transition Temperatures up to 37 K
• High-temperature superconductivity inEu0.5K0.5Fe2As2
• Pressure-induced superconductivity in BaFe 2 As 2 single crystal
• Anisotropic thermodynamic and transport properties of single-crystallineBa1−xKxFe2As2(x=0and 0.45)
• Antiferromagnetic transition inEuFe2As2: A possible parent compound for superconductors
• Superconductivity up to 29 K in SrFe2As2and BaFe2As2at high pressures
• Superconductivity at 22 K in Co-DopedBaFe2As2Crystals
• Superconductivity up to 30 K in the vicinity of the quantum critical point in BaFe2(As1−xPx)2
• La claridad después de la lluvia: apuntes del natural para el viajero ilustrado y tranquilo
• Superconductivity at 38 K in the Iron Arsenide(Ba1−xKx)Fe2As2

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