Аннотация:Active research in the field of condensed matter and nanotechnology not only led to significant progress in understanding themechanisms of formation of electrical polarization and magnetoelectric phenomena, but also showed the possibilities of creating newclasses of devices based on a combination of magnetoelectric and piezoelectric properties. Meanwhile, macroscopic properties, such asmultiferroism and piezoelectricity, are associated with local structural changes that occur under the influence of external perturbations.In a first step chosen crystal structures are analyzed by means of density functional theory (DFT) to validate the connection of externalstress and internal change of lattice symmetry as well as atomic displacements. Among them are TeO2, Li2B4O7, ZnO and SrTiO3. Alsoin focus is the influence of oxygen vacancies on our structures. The research is currently accompanied by experiments in which standingacoustic waves are encoupled in crystal samples to change the structure parameters and particularly the structures' symmetry locally.Because the displacements are expected to be on the picometer scale, X-ray diffraction on forbidden reflections is applied to observethe induced effects. The obtained switching results can significantly widen the range of functional materials and can be directly used inmodern technological applications.