36 citations · 97 across the 17 of their papers we have counts for
14 papers · 1 filter
Hyperchaos in a Magnetic Nanodisk Driven by Ferromagnetic Resonance
A Kolli, Hugo Merbouche, Salvatore Perna +3
We investigate the chaotic dynamics driven in the nonlinear regime of ferromagnetic resonance of an out-of-plane magnetized nanodisk in detail. By combining extensive micromagnetic…
Nonlinear interaction theory for parametrically-excited spin-wave modes in confined micromagnetic systems
Massimiliano d'Aquino, Salvatore Perna, Hugo Merbouche +1
We present a general theoretical approach for the quantitative description of parametric excitation of spin-wave modes in confined micromagnetic systems. This type of problem belon…
Nonlinear mode interactions under parametric excitation in a YIG microdisk
Gabriel Soares, Rafael Lopes Seeger, Amel Kolli +13
A pair of quantized spin-wave modes is driven by two-tone parallel pumping in a YIG microdisk. The nonlinear dynamics is experimentally investigated by probing the resulting steady…
Radio-frequency assisted switching in perpendicular magnetic tunnel junctions
Mark Hayward, Salvatore Perna, Massimiliano d'Aquino +5
Spin-transfer torque magnetic random-access memory (STT-MRAM) relies on nanoscale magnetic tunnel junctions (MTJs) as its fundamental building blocks. Next-generation STT-MRAM requ…
Soft-X-ray momentum microscopy of nonlinear magnon interactions below 100-nm wavelength
Steffen Wittrock, Christopher Klose, Salvatore Perna +10
Magnons are quantised collective excitations of long-range ordered spins. At nanometre wavelengths, exchange interactions increasingly govern their dynamics, giving rise to a large…
Self-modulation instability in high power ferromagnetic resonance of BiYIG nanodisks
Igor Ngouagnia Yemeli, Salvatore Perna, Diane Gouéré +9
We study the high power ferromagnetic resonance (FMR) of perpendicularly magnetized BiYIG nanodisks where the uniaxial anisotropy almost compensates the shape anisotropy. We observ…
Quantum Micromagnetic Theory of Magnons in Finite Nanostructures
Claudio Serpico, Salvatore Perna, Massimiliano d'Aquino
This paper presents a quantum field theoretical formalism for studying magnons in finite nanostructures with arbitrary shapes and spatially nonuniform ground states. It extends the…
Mode-resolved micromagnetics study of parametric spin wave excitation in thin-film disks
Maryam Massouras, Salvatore Perna, Massimiliano d'Aquino +2
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…
Micromagnetic study of inertial spin waves in ferromagnetic nanodots
Massimiliano d'Aquino, Salvatore Perna, Matteo Pancaldi +3
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…
Non-hermiticity in spintronics: oscillation death in coupled spintronic nano-oscillators through emerging exceptional points
Steffen Wittrock, Salvatore Perna, Romain Lebrun +6
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 la…
Magnetization switching in the inertial regime
Kumar Neeraj, Matteo Pancaldi, Valentino Scalera +4
We have numerically solved the Landau-Lifshitz-Gilbert (LLG) equation in its standard and inertial forms to study the magnetization switching dynamics in a thin film ferromagn…
Analysis in k-space of Magnetization Dynamics Driven by Strong Terahertz Fields
Valentino Scalera, Matthias Hudl, Kumar Neeraj +4
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 de…
Magnetization reversal driven by low dimensional chaos in a nanoscale ferromagnet
Eric Arturo Montoya, Salvatore Perna, Yu-Jin Chen +4
Energy-efficient switching of magnetization is a central problem in nonvolatile magnetic storage and magnetic neuromorphic computing. In the past two decades, several efficient met…
Signatures of Chaos in Thermal Switching of Nanomagnets
M. d'Aquino, C. Serpico, S. Perna +4
Thermally-activated magnetization dynamics of small nanoparticles subject to microwave (AC) external fields is studied. It is shown that, under sufficiently strong microwave excita…