Imaging of ferroelectric domains by coherent scattering

This proposal is a continuation of HC-4354. we have studied the spatiotemporal dynamics of the transition from the ferroelectric monoclinic (Mc-)phase to the ferroelectric orthorhombic (c-)phase in KxNa1-xNbO3 (KNN). Spatial ordering phenomena contribute significantly to the systems free energy and thus to the overall stability of an ordered phase in correlated systems. This proposal aims at developing a new method to gain access to spatiotemporal correlation phenomena in solids. Our approach is based on analyzing the speckle patter on an area detector after diffraction of a coherent x-ray beam from ferroelectric domains.