A5042170788- Magnetic properties of thin films
- Physics of Superconductivity and Magnetism
- Theoretical and Computational Physics
- Magnetic Properties and Applications
- Magneto-Optical Properties and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Photonic Crystals and Applications
- Quantum and electron transport phenomena
- Neural Networks and Reservoir Computing
- Solid-state spectroscopy and crystallography
- Magnetic Properties of Alloys
- Copper-based nanomaterials and applications
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Electronic and Structural Properties of Oxides
- Plasmonic and Surface Plasmon Research
- Chalcogenide Semiconductor Thin Films
Adam Mickiewicz University in Poznań
2019-2024
Spintronics Research Network of Japan
2023
Gdańsk University of Technology
2018
Eddy currents in a superconductor shield the magnetic field its interior and are responsible for formation of stray outside superconducting structure. The can be controlled by external affect magnetization dynamics system placed range. In case hybrid consisting strip over layer, we theoretically predict confinement spin waves well static field. number bound states their frequencies an We present results semianalytical calculations complemented numerical modeling.
Knowledge of the spin-wave dispersion relation is a prerequisite for explanation many magnonic phenomena as well practical design devices. Spin-wave measurement by established optical techniques such Brillouin light scattering or magneto-optical Kerr effect at ultralow temperatures often forbiddingly complicated. By contrast, microwave spectroscopy can be used all but it usually lacks spatial and wave-number resolution. Here we develop variable-gap-propagating-spin-wave-spectroscopy (VGPSWS)...
Reconfigurable magnetization textures offer control of spin waves with promising properties for future low-power beyond-CMOS systems. However, materials perpendicular magnetic anisotropy (PMA) suitable stable magnetization-texture formation are characterized by high damping, which limits their applicability in magnonic devices. Here, we propose to overcome this limitation using hybrid structures, i.e., a PMA layer magnetostatically coupled low-damping soft ferromagnetic film. We...
The spin-wave dynamics in the thin CoFeB film Damon-Eshbach geometry are studied three cases of boundary conditions---free conditions, symmetrical surface anisotropy, and one-sided anisotropy. analytical model created by Wolfram De Wames was extended to include perpendicular anisotropy conditions. Its comparison with numerical simulations demonstrates perfect agreement between approaches. analysis dispersion relation indicates that presence increases avoided crossing size mode standing...
In magnonics, an emerging branch of wave physics characterized by low-energy consumption, it is highly desirable to realize circuit elements within the scope spin-wave computing. Here, based on numerical simulations, we demonstrate functionality diode and circulator steer manipulate spin waves over a wide range frequency in GHz regime. They take advantage unidirectional coupling induced interfacial Dzyaloshinskii-Moriya interaction transfer between thin ferromagnetic layers only one...
We numerically study the spin-wave dynamics in an antidot lattice based on a Co/Pd multilayer structure with reduced perpendicular magnetic anisotropy at edges of antidots. This forms magnonic crystal periodic pattern and magnetization configuration consisting out-of-plane magnetized bulk in-plane rims. Our results show different behavior spin waves rims under varying external field strength, revealing complex spectra hybridizations between modes these two subsystems. A particularly strong...
We present a detailed study of the spin-wave dynamics in single Pt/Co/W and double Pt/Co/W/Co/Pt ferromagnetic layer systems. The dispersion spin waves was measured by wavevector-resolved Brillouin light scattering spectroscopy while in-plane out-of-plane magnetization curves were alternating gradient field magnetometry. interfacial Dzyaloshinskii-Moriya interaction induced nonreciprocal relation demonstrated for both layers explicated numerical simulations theoretical formulas. results...
We investigate experimentally and theoretically the magnetization reversal process in one-dimensional magnonic structures composed of permalloy nanowires two different widths finite length arranged a periodic quasiperiodic order. The main features hysteresis loop are determined by shape anisotropies component elements dipolar interactions between them. showed, that forming ribbon can be controlled change distance neighboring ribbons. order influence introduction additional tiny switching...
We present a hybrid magnonic crystal composed of chain nanodots with strong perpendicular magnetic anisotropy and Dzyaloshinskii-Moriya interaction, positioned above permalloy waveguide. The study examines two different magnetization states in the nanodots: single-domain state an egg-shaped skyrmion state. Due to dipolar coupling between dot waveguide, strongly bound texture is formed system. Our numerical results show complex spin-wave spectra, combining effects periodicity, texture,...
One of the most intriguing properties magnonic systems is their reconfigurability, where an external magnetic field alters static configuration to influence magnetization dynamics. In this paper, we present alternative approach tunable systems. We studied theoretically and numerically a crystal induced within uniform layer by periodic pattern created sequence superconducting strips. showed that spin-wave spectrum can be tuned inhomogeneous stray superconductor in response small field....
A model of charge population decay upon ultrafast optical pulse excitation in complete, working perovskite solar cells is proposed. The equation, including injections (extractions) from to contact materials, diffusion, and recombination via first-, second-, third-order processes, solved using numerical simulations. Results simulations are positively verified by broadband transient absorption results mixed halide, triple-cation (FA0.76MA0.19Cs0.05Pb(I0.81Br0.19)3). combined analytical...
The use of spin waves as a signal carrier requires developing the functional elements allowing for multiplexing and demultiplexing information coded at different wavelengths. For this purpose, we propose system thin ferromagnetic layers dynamically coupled by rectangular resonator. We show that single double, clockwise counterclockwise, circulating modes resonator offer wide possibility control propagating waves. Particularly, frequency related to double-clockwise spin-wave mode resonator,...
We numerically study the spin wave dynamics in an antidot lattice based on a Co/Pd multilayer structure with reduced perpendicular magnetic anisotropy at edges of antidots. This forms magnonic crystal periodic pattern and magnetization configuration consisting out-of-plane magnetized bulk in-plane rims. Our results show different behavior waves rims under varying external field strength, revealing complex spin-wave spectra hybridizations between modes these two subsystems. A particularly...
Extending the current understanding and use of magnonics beyond conventional planar systems, we demonstrate surface localization spin-wave ferromagnetic resonance (FMR) modes by designing complex three-dimensional nanostructures. Using micromagnetic simulations, systematically investigate woodpile-like scaffolds gyroids - periodic chiral entities characterized their triple junctions. The study highlights critical role demagnetizing fields exchange energy in determining FMR responses 3D...
The spin-wave dynamics in the thin CoFeB film Damon-Eshbach geometry are studied three cases of boundary conditions -- free conditions, symmetrical surface anisotropy, and one-sided anisotropy. analytical model created by Wolfram De Wames was extended to include perpendicular anisotropy conditions. Its comparison with numerical simulations demonstrate perfect agreement between approaches. analysis dispersion relation indicates that presence increases avoided crossing size mode standing...
Eddy currents in a superconductor shield the magnetic field its interior and are responsible for formation of stray outside superconducting structure. The can be controlled by external affect magnetization dynamics system placed range. In case hybrid consisting strip over layer, we predict theoretically confinement spin waves well static field. number bound states their frequencies an We have presented results semi-analytical calculations complemented numerical modeling.