Work

In the series a new approach of description of inhomogeneous ferromagnetic resonance in nanoobjects systems has been developed. Features of magnetostatic structures and configurational anisotropy have been considered for magnetic films with antidot lattices of various symmetries. The structure of the ferromagnetic resonance response of the films with antidot lattice was explained. Effects of antidot lattice symmetry and system parameters on spectrum shape were studied. Magnetostatic coupling of the edge modes in square antidot lattice structures was shown to create minibands with strikingly large propagation velocities. A simple spin-wave interferometer of the Mach-Zehnder type employing a local nonuniformity of the effective magnetic field was proposed and studied. Dimensional and performance restrictions of such devices controlled by a uniform external magnetic field were discussed. A new model approach within a consistent theory of quantum-mechanical electron tunneling in heterostructures metal - insulator - metal taking into account a real electronic spectrum and spatial inhomogeneity of a dielectric barrier is developed. Correspondingly, the following tasks are solved: (a) calculations of a nano-scaled dielectric layer transparency within the two-band approximation, (b) study of specific features of electronic tunneling processes in heterostructures with semimetal electrodes and possible appearance of a negative differential resistance regions in the tunneling characteristics, (c) simulations of tunneling magnetoresistance in double spin filters with ferromagnetic dielectric barriers and elucidation of reasons of a giant difference between theoretical and experimental values, (d) development of specific recommendations for creation of novel and improvement of existing devices for micro-and nanoelectronics based on the phenomenon of electron tunneling in thin insulating layers. The model generator of electromagnetic oscillations designed in the work has been patented and introduced into the State patent registry of Ukraine. Results of the series of scientific works are reflected in 39 conference abstracts and 30 papers published in leading specialized journals both domestic and foreign such as: Phys. Rev. B, J. Appl. Phys:, J. Magn. Magn. Mater., Journal of Nanoparticles Research, Письма в ЖЭТФ, ЖЭТФ, Advances in Condensed Matter Physics, ФНТ, Металлофизика и новейшие технологии, etc.