Registration Number
0221U101221,
0118U004007
, R & D reports
Title
Spin dynamics in magneto-ordered materials with metasurfaces"
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Head
Gorobets Yuryi I.,
Registration Date
18-01-2021
Organization
Institute of Magnetism NAS of Ukraine and MES of Ukraine
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The possibility of stabilization of nanoscale topologically nontrivial magnetic configurations (vortices, skyrmions, solitons) in soft ferromagnetic films and nanodots by dipolar coupling to an antidot matrix is demonstrated; the possibility of obtaining configurations with arbitrary helicity is revealed. Nonlinear dynamics of antiferromagnet is considered from unified view based on sigma-model for Neel vector; the effects of dynamic symmetry reduction of antiferromagnet due to the violation of Lorentz invariants of the sigma model in the presence of Dzyaloshinskii–Moriya interaction and/or high magnetic field are analyzed. A general theory of linear magnetoelastic coupling between spin and acoustic waves propagating in an arbitrary magnetic–non-magnetic layered structure and having arbitrary profiles has been developed. It is shown that the spin wave non-reciprocity caused by the Dzyaloshinskii–Moriya interfacial interaction can be “transferred” to hybridized surface acoustic waves in piezoelectric–ferromagnet–heavy metal heterostructures. The methods of realization of non-reciprocal propagation of surface acoustic waves in a giant frequency band and phase non-reciprocity of surface acoustic waves by means of their interaction with spin waves in synthetic antiferromagnet are proposed. Generalized boundary conditions at the interface between the ferro- and antiferromagnet are deduced, taking into account the energies of homogeneous and inhomogeneous exchange. An analytical model of the space-dependent frequency of ferromagnetic resonance in a perpendicularly magnetized thin film with an antidote is developed. The winding number, topological charge and Hopf index for a special class of 3D exact solutions of the Landau–Lifshitz equations in a uniaxial two-lattice antiferromagnet with the Dzyaloshinskii–Moriya interaction were calculated. It is proposed a method of increasing the size of the core of a spin Hall oscillator, in which single-mode generation can occur. Th
Product Description
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Ivanov Boris O.
Verba Roman V
Gerasimchuk Igor V.
Gorobets Oksana Yu.
Kuchko Anatoliy M.
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2021-01-18
