Standing spin waves in perpendicularly magnetized triangular dots

Kharlan, Julia; Bondarenko, P. V.; Krawczyk, Maciej; Salyuk, O.; Tartakovskaya, E. V.; Trzaskowska, A.; Golub, Vladimir

doi:10.1103/physrevb.100.184416

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…which can be calculated by employing the formulas (2), ( 3), (7). The matrix element of dipole-dipole interaction for spin waves with inhomogeneous profile along the rings' thickness takes the form…”

Section: Resultsmentioning

confidence: 99%

“…Standing spin waves (SWs) are being studied in magnetic materials since the late 1950s, when Charles Kittel theoretically predicted their existence in perpendicularly magnetized ferromagnetic films [1] and almost immediately they were observed experimentally [2]. With the development of patterning techniques, particularly electron-beam lithography, standing SW modes were observed in micron-sized ferromagnetic elements due to their restricted lateral dimensions [3][4][5][6][7]. Having in mind that magnetic nanoelements are being used in many real world applications-magnetic recording read-write heads [8], magnetic random access memories [9], spin-torque oscillators [10], and microwave to spin-wave transducers [11], just to name a few-it is crucial to know and understand their SW spectra.…”

Section: Introductionmentioning

confidence: 99%

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Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields

et al. 2021

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Control of the spin wave dynamics in nanomagnetic elements is very important for the realization of a broad range of novel magnonic devices. Here we study experimentally the spin wave resonance in thick ferromagnetic rings (100 nm) using perpendicular ferromagnetic resonance spectroscopy. Different from what was observed for the continuous film of the same thickness, or from rings with similar lateral dimensions but with lower thicknesses, the spectra of thick patterned rings show a nonmonotonic dependence of the mode intensity on the resonance field for a fixed frequency. To explain this effect, the theoretical approach by considering the dependence of the mode profiles on both the radial and axial coordinates was developed. It was demonstrated that such unusual behavior is a result of the competition between exchange and dipolar fields acting at the spin excitations in the structure under study. The calculations are in a good agreement with the experimental results.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields

et al. 2021

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“…The SW resonances obtained in the FMR measurements, i.e. under excitation with the homogeneous microwave eld, in the out-of-plane magnetized Py dots of the circular [121], triangular shape [122], and rings [123] where explained with the use of dispersion relation of SWs in thin lm.…”

Section: Spin-wave Modes In Con Ned Geometry With Out-of-plane Magnet...mentioning

confidence: 99%

Spin dynamics in patterned magnetic multilayers with perpendicular magnetic anisotropy

Zelent

Gruszecki

Moalic

et al. 2022

Solid State Physics

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“…Our results are finally summarized in a proposal of a field-driven magnetic phase diagram. It must be stressed that such prism-type geometries have been even experimentally synthesized [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Field-Driven Magnetic Phase Diagram and Vortex Stability in Fe Nanometric Square Prisms

2022

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In this work, we deal with the zero temperature hysteretic properties of iron (Fe) quadrangular nanoprisms and the size conditions underlying magnetic vortex states formation. Different aspect ratios of a square base prism of thickness t with free boundary conditions were considered in order to summarize our results in a proposal of a field-driven magnetic phase diagram where such vortex states are stable along the hysteresis loops. To do that, a Hamiltonian consisting of exchange, magnetostatic, Zeeman and cubic anisotropy energies was considered. The time dynamics at each magnetic field step was performed by solving the time-dependent Landau–Lifshitz–Gilbert differential equation. The micromagnetic simulations were performed using the Ubermag package based on the Object Oriented Micromagnetic Framework (OOMMF). Circular magnetic textures were also characterized by means of topological charge calculations. The aspect ratio dependencies of the coercive force, nucleation and annihilation fields are also analyzed. Computations agree with related experimental observations and other micromagnetic calculations.

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Standing spin waves in perpendicularly magnetized triangular dots

Cited by 7 publications

References 29 publications

Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields

Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields

Spin dynamics in patterned magnetic multilayers with perpendicular magnetic anisotropy

Field-Driven Magnetic Phase Diagram and Vortex Stability in Fe Nanometric Square Prisms

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