Hall effect in a GdBa2Cu3O7d/La0.75Sr0.25MnO3 perovskite bilayer

N. HABERKORN; G. BRIDOUX; E. OSQUIGUIL; J. GUIMPEL; G. NIEVA

Bariloche

Conferencia; 13th International conference on solid films and surfaces; 2006

We present results on the Hall coefficient RH in the normal state for a GdBa2Cu3O7d/La0.75Sr0.25MnO3 bilayer and a La0.75Sr0.25MnO3 filmgrown by dc magnetron sputtering on (1 0 0) SrTiO3.We find that the electric transport on the bilayer can be qualitatively described using a simpleparallel layers model. The GdBa2Cu3O7d layer presents a carrier density approximately equal to that reported for 7  d = 6.85 oxygen doping.Also we observe an unexpected presence of two Hall resistivity regimes, effects that may be associated with the internal magnetic field induced onthe superconducting layer by the ferromagnetic layer.