Registration Number
0221U000194,
0118U003265
, R & D reports
Title
Magnetic multilayer nanostructures based on antiferromagnets for elements of terahertz spintronics
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Head
Kravets Anatoly F., Кандидат фізико-математичних наук
Registration Date
03-01-2021
Organization
Institute of Magnetism NAS of Ukraine and MES of Ukraine
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The choice of types of magnetic multilayer nanostructures based on antiferromagnets with the expected magnetic dynamic properties was substantiated and a choice of models for calculations of their magnetic and resonant properties was made. Experimental samples of magnetic multilayer nanostructures on the basis of antiferromagnets of different type with expected magnetic properties are made. The influence of the parameters of composite layers on spin dynamics in multilayer nanostructures on the basis of antiferromagnets of different type is investigated. An innovative approach to increasing the magnetic resonance frequencies of multilayer nanostructures to the sub-terahertz range is developed by combining layers of strong ferromagnets (AF) and weak antiferromagnets (AFM) with a pronounced proximity effect on the AF/AFM interface. In this case, due to the narrowing of the frequency gap between magnetic resonances in FM and AFM materials, there is an effective energy exchange between spin excitations in these materials, the resonant frequencies of the FM/AFM structures are significantly increased, and there is a possibility of filling the frequency gap between gigahertz (FM) and terahertz (FM) bands (AFM), which is important for high-speed spintron applications. For nanostructured ferromagnet-nonmagnetic layer-antiferromagnet systems, spin-anisotropic properties at the interface of non-magnetic material - antiferromagnet were first experimentally investigated. The regularities of the change in the spin current relaxation in the antiferromagnetic layer as a function of the angle between the polarization of the spin current and the Neel vector have been elucidated. The experiment is based on the effect of spin pumping caused by ferromagnetic resonance. Unlike other approaches, in this case the resonating ferromagnetic layer acts as a source of spin current and at the same time characterizes the scattering of spin current in adjacent layers. It is shown that in such str
Product Description
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Kravets Anatolii F
Litvinenko Yarina M.
Polishchuk Dmytro M.
Polek Taras I.
Tovstolytkin Oleksandr I
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2021-01-03
