Abstract
The electric field influence on the neutron diffraction pattern of SrxBa1-xNb2O6 (SBN-x) mixed crystals (x=0.70, 0.75) is studied using time-of-flight (TOF) technique. The change of the elastic diffuse and Bragg intensities during field switching and (zero-field and field) cooling is discussed in connection with the dipol glass-like behaviour of these relaxors and domain properties.