Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Perna, Salvatore"'
Publikováno v:
Phys. Rev. B 110, 064435 (2024)
We present a computational study of the parametric excitation of spin waves in thin film disks with a mode-resolved approach. The method involves projecting out the time-dependent magnetization, computed using micromagnetics simulations, onto the spa
Externí odkaz:
http://arxiv.org/abs/2404.07561
We consider the numerical solution of the inertial version of Landau-Lifshitz-Gilbert equation (iLLG), which describes high-frequency nutation on top of magnetization precession due to angular momentum relaxation. The iLLG equation defines a higher-o
Externí odkaz:
http://arxiv.org/abs/2310.09043
Autor:
d'Aquino, Massimiliano, Perna, Salvatore, Pancaldi, Matteo, Hertel, Riccardo, Bonetti, Stefano, Serpico, Claudio
Publikováno v:
Phys. Rev. B 107, 144412 (2023)
Here we report the possibility to excite ultra-short spin waves in ferromagnetic thin-films by using time-harmonic electromagnetic fields with terahertz frequency. Such ultra-fast excitation requires to include inertial effects in the description of
Externí odkaz:
http://arxiv.org/abs/2302.10759
Autor:
Wittrock, Steffen, Perna, Salvatore, Lebrun, Romain, Ho, Katia, Dutra, Roberta, Ferreira, Ricardo, Bortolotti, Paolo, Serpico, Claudio, Cros, Vincent
Publikováno v:
Nat. Commun. 15, 971 (2024)
The emergence of exceptional points (EPs) in the parameter space of a non-hermitian (2D) eigenvalue problem is studied in a general sense in mathematical physics, and has in the last decade successively reached the scope of experiments. In coupled sy
Externí odkaz:
http://arxiv.org/abs/2108.04804
Autor:
Neeraj, Kumar, Pancaldi, Matteo, Scalera, Valentino, Perna, Salvatore, d'Aquino, Massimiliano, Serpico, Claudio, Bonetti, Stefano
We have numerically solved the Landau-Lifshitz-Gilbert (LLG) equation in its standard and inertial forms to study the magnetization switching dynamics in a $3d$ thin film ferromagnet. The dynamics is triggered by ultrashort magnetic field pulses of v
Externí odkaz:
http://arxiv.org/abs/2107.08234
The impact of granular microstructure in permanent magnets on eddy current losses are investigated. A numerical homogenization procedure for electrical conductivity is defined. Then, an approximated simple analytical model for the homogenized conduct
Externí odkaz:
http://arxiv.org/abs/2006.01092
Autor:
Scalera, Valentino, Hudl, Matthias, Neeraj, Kumar, Perna, Salvatore, d'Aquino, Massimiliano, Bonetti, Stefano, Serpico, Claudio
Demagnetization in a thin film due to a terahertz pulse of magnetic field is investigated. Linearized LLG equation in the Fourier space to describe the magnetization dynamics is derived, and spin waves time evolution is studied. Finally, the demagnet
Externí odkaz:
http://arxiv.org/abs/2005.05742
Autor:
Montoya, Eric Arturo, Perna, Salvatore, Chen, Yu-Jin, Katine, Jordan A., d'Aquino, Massimiliano, Serpico, Claudio, Krivorotov, Ilya N.
Energy-efficient switching of magnetization is a central problem in nonvolatile magnetic storage and magnetic neuromorphic computing. In the past two decades, several efficient methods of magnetic switching were demonstrated including spin torque, ma
Externí odkaz:
http://arxiv.org/abs/1806.03383
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