Exploring the interplay between new ordered phases and electron transfer at cuprate/manganite interfaces with XLD, XMLD and XMCD

With X-ray Absorption Spectroscopy, we want to study how the various ground states of the manganite affect the interfacial electron transfer in YBa2Cu3O7/Nd1-x(Ca1-ySry)xMnO3 multilayers (MLs), as well as the orbital reconstruction and the induced Cu magnetic moment. Detailed investigations have been done in MLs with x=0.30-0.35, for which the manganite is an itinerant ferromagnet (FM), triggered by the interest for exotic superconductor/FM quantum states. However, the phase diagram of the manganites exhibits a versatile platform of electronic and magnetic states, for which little is known about the interface effects in such MLs. Our preliminary data at x=0.5 suggest that these interface effects are indeed very sensitive to the hole doping of the manganite. Therefore, we want to further explore MLs with other hole content, x, across the manganite phase diagram, as indicated in Figure 1.