high-temperature superconductivity;
other cuprates;
effects of material synthesis;
structure;
chemistry;
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摘要:
Evidence is reported that Sr2YRu1−uCuuO6 superconducts with a transition temperature of at least Tc ≈ 30 K for u = 0.1, confirming the reports by Wu et al. that this material superconducts despite having no cuprate planes. (Such planes are widely believed to be necessary for high-temperature superconductivity.) Coexisting with the superconductivity, Sr2YRu1−uCuuO6 exhibits magnetic order due to antiferromagnetic Ru and Cu.