Confirmation of Superconductivity in Sr2YRu1−uCuuO6

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.