<p>as macroscopic objects but also with particular focus on the study of interfaces (Oxidetronics). Optimizing the mechanisms involved in the control of: 1.-Magnetoresitsance/electroresitance from strain fields in piezo/manganite heterosetructures i. e. manipulation of the magnetic and electronic states of the ferromagnetic (manganite)layers byactuation upon the piezoelectric layer; 2.-Magnetoresistance in manganite cuprate heterostructures,determining the relative importance of the mechanism involved ( proximity effects, quasiparticles diffusion, stray fields and electronic reconstruction at the interfaces). 3. The electronic structure at the interface between complex oxides as a new route to doping alternative to the conventional chemical element substitution. This scenario includes the electrostatic doping due to electric field induced depletion and accumulation layers, bandbending at pn junctions or Schottky contacts as well as charge tranfer porcoesses stemming from valence or polarity mismatch.</p>