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0222U001260,
0119U101609
,
Elements of ultrafast neuron systems on the basis of antiferromagnetic spintronic nanostructures.
Tovstolytkin Oleksandr I., Доктор фізико-математичних наук
26-01-2022
Department for special training National academy of science of Ukraine at Kiev University
A theoretical model of a terahertz frequency signal generator based on a high-quality dielectric resonator with antiferromagnetic (AFM) spin Hall oscillators (SHO) included in it has been developed and the electrodynamic properties of such a device have been analyzed. The processes of synchronization of magnetization oscillations in AFS of Josephson type AFM are analyzed and the conditions of effective synchronization of such SHO with external monochromatic signal of different frequency and amplitude are determined. Theoretical analysis and optimization of AFM models based on spintron nanostructures was performed and it was found that the output power of the signal generator based on several AFM SHOs placed inside the dielectric resonator increases with increasing rotational speed of the AFM magnetic sublattice. It has been shown that for a terahertz detector based on tunnel contact AFM, by selecting the contact cross-sectional area and the thickness of the tunnel barrier, the resistance, capacitance and inductance of the system can be varied, which in turn affects the electrodynamic characteristics of the detector. For the first time, an approach has been proposed for the separation and characterization of dissipative processes occurring in the volume of the antiferromagnet and at the interface between the antiferromagnet and the ferromagnet. The spin dynamics of antiferromagnets in the presence of atomic dislocations and the spin disclinations generated by them have been studied. A brief overview of alternative phenomenological approaches to the spin dynamics of antiferromagnets is given in view of the current interest in high-speed spin dynamics and its application. Arrays of asymmetric synthetic ferromagnets with temperature-controlled interlayer interaction through layers of dilute ferromagnets have been developed as functional elements of modern spintronics and magnon devices.
Ivanov Boris O.
Kravets Anatoly Fedorovych
Lytvynenko Yaryna M.
Prokopenko Oleksandr Volodymyrovych
Pustovit Yurii V.
Slobodianiuk Denys V.
2022-03-09
Updated: 2025-12-21
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