There are a number of room temperature multiferroics based on BiFeO3. The BiFeO3 - PbTiO3 (BFPT) system shows ferroelectric and antiferromagnetic ordering at room temperature for a wide range of compositional space. We have shown during previous experiments that internal (due to domains) and external (hydrostatic) pressure can readily affect the phase and magnetic ordering in these materials. The intention of this experiment is to use an applied electric field, to generate a electrostrictive stress. This stress (few hundred MPa) will in turn affect the texture/phase content and therefore the magnetic ordering.