Abstract
In this study, epitaxial bilayers of ferromagnetic of La2/3Ca1/3MnO3 (LCMO) and superconducting YBa2Cu3O7-x (YBCO) were grown on SrTiO3 (001) substrates by pulsed laser deposition assisted with high pressure reflection high energy electron diffraction. Two different interfaces (La,Ca-O/Cu-O & Mn-O/Ba-O) have been designed and created to be a model template to understand the coupling behaviors at the interfaces. X-ray absorption near edge spectroscopy (XANES) have been applied to study the electronic structures of LCMO/YBCO with different interfaces. We demonstrate that extensive charge transfer occurs between LCMO and YBCO. In addition, our experiments show there is obvious energy shift in the absorption spectrum Mn L edge of different interfaces. Different interfaces lead to the difference of orbital reconstructions, which confirmed by linear dichroism (LD) effect. This study opens new venue to design the functional interfaces.
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