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Your search keyword '"Valentino Scalera"' showing total 4 results
Start Over Author "Valentino Scalera" Publisher institute of electrical and electronics engineers (ieee)
4 results on '"Valentino Scalera"'

1. Magnetostatic Field Computation in Thin Films Based on k-Space Fast Convolution With Truncated Green’s Function

Author

Massimiliano d'Aquino, Claudio Serpico, Fabio Villone, Valentino Scalera, S. Perna, Nicola Isernia, Perna, Salvatore, Scalera, Valentino, D'Aquino, Massimiliano, Isernia, Nicola, Villone, Fabio, and Serpico, Claudio

Subjects
Physics, Field (physics), Computation, Mathematical analysis, k-space, k-space discretization, magnetostatic field, Fast convolution, Electronic, Optical and Magnetic Materials, Convolution, symbols.namesake, Green's function, symbols, Electrical and Electronic Engineering, Thin film
Published
2022
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2. Numerical Solution of the Fokker-Planck Equation by Spectral Collocation and Finite-Element Methods for Stochastic Magnetization Dynamics

Author

Patrizio Ansalone, Valentino Scalera, Claudio Serpico, Massimiliano d'Aquino, S. Perna, Scalera, Valentino, Ansalone, Patrizio, Perna, Salvatore, Serpico, Claudio, and D'Aquino, Massimiliano

Subjects
Physics, Magnetization dynamics, switching, Mathematical analysis, Finite element analysis, Thermal stability, Energy barrier, Magnetization, Finite element method, Electronic, Optical and Magnetic Materials, Spectral collocation, Switches, Magnetomechanical effects, Thermal analysis, Fokker-Planck (FP) equation, numerical methods, Fokker–Planck equation, Electrical and Electronic Engineering
Published
2022
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3. Analytical Treatment of Nonlinear Ferromagnetic Resonance in Nanomagnets

Author

Massimiliano d'Aquino, Valentino Scalera, S. Perna, Isaak D. Mayergoyz, G. Bertotti, A. Quercia, Claudio Serpico, D'Aquino, M., Quercia, A., Scalera, V., Perna, S., Bertotti, G., Mayergoyz, I. D., and Serpico, C.

Subjects
Bifurcations, ferromagnetic resonance (FMR), foldover, magnetization dynamics, nonlinear system theory, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, Frequency response, Magnetic domain, Dynamical systems theory, 01 natural sciences, Magnetization, 0103 physical sciences, Electronic, Optical and Magnetic Materials, 010306 general physics, 010302 applied physics, Physics, Condensed matter physics, Electronic, Optical and Magnetic Material, Ferromagnetic resonance, Nanomagnet, magnetization dynamic, Nonlinear system, Nonlinear resonance, Bifurcation
Abstract

We study magnetization oscillations in a uniformly magnetized nanomagnet driven by ac excitations (external fields and injected currents) when the frequency of excitation is close to ferromagnetic resonance frequency. By using separation of time scale and the averaging technique, we derive dynamical equations, which can be studied by the methods of dynamical systems theory. This leads to an analytical description of nonlinear frequency response and to the analysis of relevant bifurcation phenomena. The theoretical results are compared with numerical simulations.

Published
2017
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4. Effect of Temperature in Hysteretic Synchronization of Magnetic Vortex Spin-Torque Nano-Oscillators

Author

Valentino Scalera, Claudio Serpico, A. Quercia, Massimiliano d'Aquino, S. Perna, D'Aquino, M., Perna, S., Quercia, A., Scalera, V., and Serpico, C.

Subjects
Thermal fluctuations, 02 engineering and technology, 01 natural sciences, Synchronization (alternating current), Condensed Matter::Materials Science, Hysteresis, spin-torque, synchronization, thermal fluctuations, vortex oscillator, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, Condensed Matter::Superconductivity, 0103 physical sciences, Electronic, Optical and Magnetic Materials, 010306 general physics, Bifurcation, Spin-½, Nanopillar, Physics, Condensed matter physics, Oscillation, Electronic, Optical and Magnetic Material, 021001 nanoscience & nanotechnology, Magnetic hysteresis, Vortex, thermal fluctuation, Hysteresi, 0210 nano-technology
Abstract

The synchronization of vortex spin-transfer nano-oscillators (both nanopillar and nanocontact structures) with external microwave excitations is considered. A collective variables description is used to derive an analytical reduced-order model for the vortex core dynamics, which is able to predict all the possible oscillation regimes and hysteretic transitions among them. The influence of thermal fluctuations on hysteretic synchronization is studied by full micromagnetic simulations. The numerical results are in good agreement with the theory.

Published
2017
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