Abstract
Element-specific x-ray magnetic circular dichroism measurements at the $\text{Ru}\text{ }{L}_{3}$ absorption edge are used to search for the presence of a net Ru ferromagnetic moment in the superconducting state of ${\text{RuSr}}_{2}{\text{Eu}}_{1.5}{\text{Ce}}_{0.5}{\text{Cu}}_{2}{\text{O}}_{10}$. A net moment of $0.21{\ensuremath{\mu}}_{B}/\text{Ru}$ is observed in zero applied field. Together with a homogeneous Ru local structure probed by x-ray absorption fine-structure measurements, the results unequivocally demonstrate the coexistence of a ferromagnetic component in the magnetically ordered ${\text{RuO}}_{2}$ planes with superconductivity in the ${\text{CuO}}_{2}$ planes.
Published Version
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