• 74.78.Fk;
  • 75.47.Lx;
  • 75.60.–d;
  • 75.70.–i;
  • 78.20.Ls


The paper reports on an investigation of the superconducting and magnetic properties of a YBa2Cu3O7/La0.67Sr0.33MnO3 bilayer grown on LaAlO3. Beside structural, transport and optical characterisation the magneto-optical analysis was the main tool to study the local properties of the bilayer. The optical analysis shows the twinned structure exhibited by the substrate and the magneto-optical analysis allows visualizing the manganite magnetic domain structure with in plane-field magnetization, divided by domain walls where magnetic moments tilt out of the film plane. After cooling below Tc the domain-wall stray field induces vortex decoration patterns. Under an external magnetic field flux penetration is strongly modulated by the manganite domain walls. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)