Influence of curvature on the dynamical susceptibility of bent nanotubes

Saavedra, Eduardo; Castillo-Sepúlveda, S.; Corona, Rosa M.; Altbir, D.; Escrig, Juan; Carvalho-Santos, Vagson L.

doi:10.1016/j.rinp.2022.105290

Cited by 7 publications

(10 citation statements)

References 55 publications

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“…[44][45][46] On the other hand, to simulate the dynamic response of the magnetization (FMR spectra), we have used an a = 0.015. 47,48 In addition, we have used a sinc wave excitation field: 49,50…”

Section: Micromagnetic Simulationsmentioning

confidence: 99%

“…On the other hand, to simulate the dynamic response of the magnetization (FMR spectra), we have used an α = 0.015. 47,48 In addition, we have used a sinc wave excitation field: 49,50 , applied along the y -direction to perturb the magnetization of the system. The amplitude of the sinc wave was h 0 = 1 mT, the cut-off frequency f c = 50 GHz and τ = t − t 0 was the simulation time ( t ), with an offset t 0 .…”

Section: Micromagnetic Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

Static and dynamic magnetic properties of circular and square cobalt nanodots in hexagonal cells

Mélica,

Saavedra,

Escrig

et al. 2024

Phys. Chem. Chem. Phys.

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Section: Micromagnetic Simulationsmentioning

confidence: 99%

Section: Micromagnetic Simulationsmentioning

confidence: 99%

Static and dynamic magnetic properties of circular and square cobalt nanodots in hexagonal cells

Mélica,

Saavedra,

Escrig

et al. 2024

Phys. Chem. Chem. Phys.

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“…max 0 [60,61], where the amplitude is h 0 = 1 mT, and the cut-off frequency is f = 40 GHz. The time evolution of the magnetization is sampled every 10 ps, during a total time of 20 ns.…”

Section: Theoretical Modelmentioning

confidence: 99%

Curvature-induced stabilization and field-driven dynamics of magnetic hopfions in toroidal nanorings

Corona¹,

Saavedra²,

Castillo-Sepúlveda³

et al. 2023

Nanotechnology

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Three dimensional magnetic textures are a cornerstone in magnetism researches. In this work, we analyze the stabilization and dynamic response of a magnetic hopfion hosted in a toroidal nanoring with intrinsic Dzialoshinskii-Moriya interaction simulating FeGe. Our results evidence that unlike their planar counterpart, where perpendicular magnetic anisotropies are necessary to stabilize hopfions, the shape anisotropy originated on the torus symmetry naturally yields the nucleation of these topological textures. We also analyze the magnetization dynamical response by applying a magnetic field pulse to differentiate among several magnetic patterns. Finally, to understand the nature of spin wave modes, we analyze the spatial distributions of the resonant mode amplitudes and phases and describe the differences among bulk and surface modes. Importantly, hopfions lying in toroidal nanorings present a non-circularly symmetric poloidal resonant mode, which is not observed in other systems hosting hopfions.

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“…On the other hand, to simulate the dynamic response of magnetization (FMR spectra), we used α = 0.015 [ 59 ]. In addition, we applied a sinc wave excitation field [ 51 ]

along the y -direction to perturb the magnetization of the system. The sinc function is a mathematical function used to describe the spectral response of a low-pass filter or the pulse response of a sampling system.…”

Section: Micromagnetic Simulationsmentioning

confidence: 99%

“…Salazar-Cardona et al [ 50 ] proposed a device based on coplanar waveguides that would selectively measure the exchange or dipole-induced spin wave nonreciprocities. Recently, some of us analyzed the dynamic susceptibility of curved permalloy nanotubes [ 51 ] and permalloy wire-tube nanostructures [ 52 ]. However, to the best of our knowledge, there are no studies that systematically investigate the static and dynamic properties of Fe 3 O 4 nanotubes, despite the high aspect ratio being conducive to electron conduction and further increasing the conduction loss capability [ 53 ].…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Magnetic Properties of Fe3O4 Nanotubes

et al. 2023

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In this paper, our objective was to investigate the static and dynamic magnetic properties of Fe3O4 nanotubes that are 1000 nm long, by varying the external radius and the thickness of the tube wall. We performed a detailed numerical analysis by simulating hysteresis curves with an external magnetic field applied parallel to the axis of the tubes (along the z-axis). Our findings indicate that nanotubes with an external radius of 30 nm exhibit non-monotonic behavior in their coercivity due to a change in the magnetization reversal mechanism, which was not observed in nanotubes with external radii of 80 nm. Additionally, we explored the dynamic susceptibility of these nanotubes and found that the position and number of resonance peaks can be controlled by manipulating the nanotube geometry. Overall, our study provides valuable insights into the behavior of Fe3O4 nanotubes, which can aid in the design and improvement in pseudo-one-dimensional technological devices.

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Influence of curvature on the dynamical susceptibility of bent nanotubes

Cited by 7 publications

References 55 publications

Static and dynamic magnetic properties of circular and square cobalt nanodots in hexagonal cells

Static and dynamic magnetic properties of circular and square cobalt nanodots in hexagonal cells

Curvature-induced stabilization and field-driven dynamics of magnetic hopfions in toroidal nanorings

Static and Dynamic Magnetic Properties of Fe3O4 Nanotubes

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