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Solid‐state reactions of Y2O3, BaCO3, and CuO mixtures at stoichiometric ratios of YBa4Cu6Ox reveal superconducting products having quite interesting and unusual properties. For instance, superconducting transition Tc at 90 K even without annealing in oxygen flow could be observed. Existence of a ferromagnetic‐like behavior was recognized at low temperatures and magnetic fields greater than 1 T. Critical...
We synthesized, for the first time, superconducting eutectic composed of two new superconducting phases, namely of Mo_2Re_3B_x and of Mo_3Re_2B_x (where x≈1) and investigated its basic transport, magnetic, and microwave properties. The transition temperatures T_c were equal to 6.6 K and to 8.7 K for Mo_3Re_2B_x and Mo_2Re_3B_x compound, respectively. The phases present in the eutectic were identified...
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