Long length scale interaction between magnetism and superconductivity in La mathsf{_{0.3}}Ca mathsf{_{0.7}}MnOmathsf{_3}/YBamathsf{_2}Cumathsf{_3}Omathsf{_7} superlattices
1. GFMC. Dpto. Fisica Aplicada III, Universidad Complutense de Madrid, 28040, Madrid, Spain 2. Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), 28049, Cantoblanco, Madrid