The temperature-dependent magnetization profile across an epitaxial bilayer of ferromagnetic La2/3Ca1/3MnO3 and superconducting YBa2Cu3O7-δ

Abstract

Epitaxial bilayers of ferromagnetic (FM) La2/3Ca 1/3MnO3 (LCMO) and superconducting YBa2Cu3O 7?δ (YBCO) have been grown on singlecrystalline SrTiO 3 (STO) substrates by pulsed laser deposition. The manganese magnetization profile across the FM layer has been determined with high spatial resolution at low temperatures by x-ray resonant magnetic reflectivity (XRMR) performed at the BESSY II synchrotron light source of the Helmholtz Zentrum Berlin. It is found that not only the adjacent superconductor but also the substrate underneath influences the magnetization of the LCMO film at the interface at low temperatures. Both effects can be investigated individually by XRMR. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.