99 citations · 978 across the 34 of their papers we have counts for
25 papers · 1 filter
Dynamic annihilation pathways of magnetic skyrmions
Matthew Copus, Ezio Iacocca
The investigation of magnetic solitons often relies on numerical modeling to determine key features such as stability, annihilation, nucleation, and motion. However, as soliton siz…
Generalized fractional approach to solving partial differential equations with arbitrary dispersion relations
Kyle Rockwell, Ezio Iacocca
Fractional calculus has been used to describe physical systems with complexity. Here, we show that a fractional calculus approach can restore or include complexity in any physical…
Gænice: a general model for magnon band structure of artificial spin ices
Ghanem Alatteili, Victoria Martinez, Alison Roxburgh +4
Arrays of artificial spin ices exhibit reconfigurable ferromagnetic resonance frequencies that can be leveraged and designed for potential applications.However, analytical and nume…
Ultrastrong magnon-magnon coupling and chiral spin-texture control in a dipolar 3D multilayered artificial spin-vortex ice
Troy Dion, Kilian D. Stenning, Alex Vanstone +12
Strongly-interacting nanomagnetic arrays are ideal systems for exploring reconfigurable magnonics. They provide huge microstate spaces and integrated solutions for storage and neur…
Evidence of extreme domain wall speeds under ultrafast optical excitation
Rahul Jangid, Nanna Zhou Hagström, Meera Madhavi +14
Time-resolved ultrafast EUV magnetic scattering was used to test a recent prediction of >10 km/s domain wall speeds by optically exciting a magnetic sample with a nanoscale labyrin…
Megahertz-rate Ultrafast X-ray Scattering and Holographic Imaging at the European XFEL
Nanna Zhou Hagström, Michael Schneider, Nico Kerber +97
The advent of X-ray free-electron lasers (XFELs) has revolutionized fundamental science, from atomic to condensed matter physics, from chemistry to biology, giving researchers acce…
Anisotropic MagnetoMemristance
Francesco Caravelli, Ezio Iacocca, Gia-Wei Chern +2
In the last decade, nanoscale resistive devices with memory have been the subject of intense study because of their possible use in brain-inspired computing. However, operational e…
Controllable vortex shedding from dissipative exchange flows in ferromagnetic channels
Ezio Iacocca
Ferromagnetic channels subject to spin injection at one extremum sustain long-range coherent textures that carry spin currents known as dissipative exchange flows (DEFs). In the we…
Ultrafast perturbation of magnetic domains by optical pumping in a ferromagnetic multilayer
Dmitriy Zusin, Ezio Iacocca, Loïc Le Guyader +23
Ultrafast optical pumping of spatially nonuniform magnetic textures is known to induce far-from-equilibrium spin transport effects. Here, we use ultrafast x-ray diffraction with un…
Tailoring spin wave channels in a reconfigurable artificial spin ice
Ezio Iacocca, Sebastian Gliga, Olle Heinonen
Artificial spin ices are ensembles of geometrically-arranged, interacting nanomagnets which have shown promising potential for the realization of reconfigurable magnonic crystals.…
Hydrodynamic description of long-distance spin transport through noncollinear magnetization states: the role of dispersion, nonlinearity, and damping
Ezio Iacocca, Mark A. Hoefer
Nonlocal compensation of magnetic damping by spin injection has been theoretically shown to establish dynamic, noncollinear magnetization states that carry spin currents over micro…
Spin-current-mediated rapid magnon localisation and coalescence after ultrafast optical pumping of ferrimagnetic alloys
E. Iacocca, T-M. Liu, A. H. Reid +31
Sub-picosecond magnetisation manipulation via femtosecond optical pumping has attracted wide attention ever since its original discovery in 1996. However, the spatial evolution of…
Transverse instabilities of stripe domains in magnetic thin films with perpendicular magnetic anisotropy
Max E. Ruth, Ezio Iacocca, Panayotis G. Kevrekidis +1
Stripe domains are narrow, elongated, reversed regions that exist in magnetic materials with perpendicular magnetic anisotropy. Stripe domains appear as a pair of domain walls that…
Tunable mode coupling in nano-contact spin torque oscillators
Steven S. -L. Zhang, Ezio Iacocca, Olle Heinonen
Recent experiments on spin torque oscillators have revealed interactions between multiple magnetodynamic modes, including mode-coexistence, mode-hopping, and temperature-driven cro…
Topologically non-trivial magnon bands in artificial square spin ices subject to Dzyaloshinskii-Moriya interaction
Ezio Iacocca, Olle Heinonen
Systems that exhibit topologically protected edge states are interesting both from a fundamental point of view as well as for potential applications, the latter because of the abse…
Vortex-antivortex proliferation from an obstacle in thin film ferromagnets
Ezio Iacocca, Mark A. Hoefer
Magnetization dynamics in thin film ferromagnets can be studied using a dispersive hydrodynamic formulation. The equations describing the magnetodynamics map to a compressible flui…
Breaking of Galilean invariance in the hydrodynamic formulation of ferromagnetic thin films
Ezio Iacocca, T. J. Silva, Mark A. Hoefer
Microwave magnetodynamics in ferromagnets are often studied in the small-amplitude or weakly nonlinear regime corresponding to modulations of a well-defined magnetic state. However…
Dynamic response of an artificial square spin ice
M. B. Jungfleisch, W. Zhang, E. Iacocca +9
Magnetization dynamics in an artificial square spin-ice lattice made of Ni80Fe20 with magnetic field applied in the lattice plane is investigated by broadband ferromagnetic resonan…
Effects of thermal perturbations on magnetic dissipative droplet solitons
P. Wills, E. Iacocca, M. A. Hoefer
The magnetic dissipative droplet is a strongly nonlinear wave structure that can be stabilized in a thin film ferromagnet exhibiting perpendicular magnetic anisotropy by use of spi…
Reconfigurable spin wave band structure of artificial square spin ice
Ezio Iacocca, Sebastian Gliga, Robert L. Stamps +1
Artificial square spin ices are structures composed of magnetic elements arranged on a geometrically frustrated lattice and located on the sites of a two-dimensional square lattice…
Comprehensive and Macrospin-Based Magnetic Tunnel Junction Spin Torque Oscillator Model - Part II: Verilog-A Model Implementation
Tingsu Chen, Anders Eklund, Ezio Iacocca +4
The rapid development of the magnetic tunnel junction (MTJ) spin torque oscillator (STO) technology demands an analytical model to enable building MTJ STO-based circuits and system…
Comprehensive and Macrospin-Based Magnetic Tunnel Junction Spin Torque Oscillator Model - Part I: Analytical Model of the MTJ STO
Tingsu Chen, Anders Eklund, Ezio Iacocca +4
Magnetic tunnel junction (MTJ) spin torque oscillators (STO) have shown the potential to be used in a wide range of microwave and sensing applications. To evaluate potential uses o…
Dynamical magnetic skyrmions
Y. Zhou, E. Iacocca, A. Awad +4
Spin transfer torque (STT) affords magnetic nanodevices the potential to act as memory, computing, and microwave elements operating at ultra-low currents and at a low energy cost.…
Generation linewidth of mode-hopping spin torque oscillators
Ezio Iacocca, Olle Heinonen, P. K. Muduli +1
Experiments on spin torque oscillators commonly observe multi-mode signals. Recent theoretical works have ascribed the multi-mode signal generation to coupling between energy-separ…