Effects of Ru Addition on the Superconducting Properties of the Eu-123 System |
| M. Škráteka, A. Cigáň a, A. Dvurečenskij a, M. Majerová a, R. Bystrickýa,b, P. Billik a and J. Maňka a
aInstitute of Measurement Science, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia bInstitute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia |
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| Effects of the Ru addition on the structural and superconducting properties of the Eu-123 system were studied. Samples of the nominal composition EuBa2Cu3-xRuxO7-δ with x ranging from 0.0 to 0.7 were prepared by the solid state reaction technique from Eu2O3, BaCO3, CuO and RuO2 precursors at the temperature of 1050°C for 72 h in flowing oxygen and oxygen-annealed at 580°C for 24 h. X-ray diffraction data show the presence of another Ba-Eu-Ru-O phase, for x ≥ 0.03, in addition to the main superconducting phase. AC and DC magnetization characteristics were measured by the compensation method using the second-order SQUID gradiometer at ≈ 77 K and the QD SQUID magnetometer MPMS XL-7 at 20 K. The superconducting properties, Tc, ΔTc, change only weakly up to x = 0.2, and magnetization M(H) deteriorates with an increasing Ru content. |
DOI: 10.12693/APhysPolA.127.225 PACS numbers: 74.72.-h, 74.25.Ha, 75.30.Et, 75.60.-d |