This project focuses on the elaboration of a composite material presenting new functionalities, thanks to its innovative chemical composition and structure, which will allow tuning its magnetic properties by the application of an electric field. We will sinter new composites artificially coupling together an inorganic piezoelectric matrix with unidimentional ferromagnetic nano-inclusions. The use of lead-free piezoelectric compounds and rare earth-free magnets is proactive in relation with the current legislation. A new, low-cost and eco-friendly elaboration process will be developed. In particular the uniqueness of our project consists in using the Spark Plasma Sintering technique assisted by a magnetic field allowing the control of the magnetic nano-inclusions organization within the piezoelectric matrix. The final goal will be the optimization of the Magneto-Electric coupling properties. These properties will be studied as function of the micro and nanostructure and the quality of the interfaces between the two phases. The main innovative aspects and goals of the COMPAGNON project are: • The development of an innovative composite, presenting coupled functions making possible the tuning of the permanent magnet parameters (Mr, Ms, Hc and Ka) by the application of an electric field. These composites will present magnetoelectric coupling coefficients of the order of hundreds of mV.cm-1.Oe-1. • Characterization of the interfaces in the composite by the development of advanced multi-scale techniques: atomic (high resolution TEM, EELS, etc.), nanostructural (FIB-3D) and bulk ones (XPS, PDF, etc.). • Contribute to the understanding of the link between the structure, the composition and the interface within the nanocomposites (nanowires-matrix) and the ME properties evolution. • To shade light either at a fundamental level (nucleation and growth of nanowires and/or core@shell materials, magneto-electric coupling, control of grain size, nature of the interfaces and densification/structuring effect on the composites…) and at the technological one (nanostructuring under magnetic field) in the frame of multifunctional materials. • Provide free rare earths permanent magnets with a magnetic field of the order of 1 T whose magnetic energy could be tuned by an electric field.