41 citations · 204 across the 19 of their papers we have counts for
16 papers · 1 filter
Accelerating micromagnetic and atomistic simulations using multiple GPUs
Serban Lepadatu
It is shown micromagnetic and atomistic spin dynamics simulations can use multiple GPUs in order to reduce computation time, but also to allow for a larger simulation size than is…
All-optical magneto-thermo-elastic skyrmion motion
Serban Lepadatu
It is predicted magnetic skyrmions can be controllably moved on surfaces using a focused laser beam. Here an absorbed power of the order 1 mW, focused to a spot-size of the order 1…
Micromagnetic study of spin transport in easy-plane antiferromagnetic insulators
Verena Brehm, Olena Gomonay, Serban Lepadatu +4
Magnon eigenmodes in easy-plane antiferromagnetic insulators are linearly polarized and are not expected to carry any net spin angular momentum. Motivated by recent nonlocal spin t…
Self-Consistent Computation of Spin Torques and Magneto-Resistance in Tunnel Junctions and Magnetic Read-Heads with Metallic Pinhole Defects
Serban Lepadatu, Alexey Dobrynin
A three-dimensional self-consistent spin transport model is developed, which includes both tunnelling transport, as well as metallic transport. Using the spin accumulation computed…
Collective skyrmion motion under the influence of an additional interfacial spin-transfer torque
Callum R. MacKinnon, Katharina Zeissler, Simone Finizio +5
Here we study the effect of an additional interfacial spin-transfer torque, as well as the well established spin-orbit torque and bulk spin-transfer torque, on skyrmion collections…
Micromagnetic Monte Carlo method with variable magnetization length based on the Landau-Lifshitz-Bloch equation for computation of large-scale thermodynamic equilibrium states
Serban Lepadatu
An efficient method for computing thermodynamic equilibrium states at the micromagnetic length scale is introduced, using the Markov chain Monte Carlo method. Trial moves include n…
Computation of magnetization, exchange stiffness, anisotropy, and susceptibilities in large-scale systems using GPU-accelerated atomistic parallel Monte Carlo algorithms
Serban Lepadatu, George McKenzie, Tim Mercer +2
Monte Carlo algorithms are frequently used in atomistic simulations, including for computation of magnetic parameter temperature dependences in multiscale simulations. Even though…
Role of an additional interfacial spin-transfer torque for current-driven skyrmion dynamics in chiral magnetic layers
C. R. MacKinnon, S. Lepadatu, T. Mercer +1
Skyrmions can be driven by spin-orbit torques as a result of the spin Hall effect. Here we model an additional contribution in ultra-thin multilayers, arising from the spin accumul…
Boris Computational Spintronics -- High Performance Multi-Mesh Magnetic and Spin Transport Modelling Software
Serban Lepadatu
This work discusses the design and testing of a new computational spintronics research software. Boris is a comprehensive multi-physics open-source software, combining micromagneti…
Emergence of Transient Domain Wall Skyrmions after Ultrafast Demagnetisation
Serban Lepadatu
It is known that ultrafast laser pulses can be used to deterministically switch magnetisation and create skyrmions, however the deterministic creation of a single Néel skyrmion aft…
Efficient computation of demagnetising fields for magnetic multilayers using multilayered convolution
Serban Lepadatu
As research into magnetic thin films and spintronics devices is moving from single to multiple magnetic layers, there is a need for micromagnetics modelling tools specifically desi…
Effect of inter-layer spin diffusion on skyrmion motion in magnetic multilayers
Serban Lepadatu
It is well known that skyrmions can be driven using spin-orbit torques due to the spin-Hall effect. Here we show an additional contribution in multilayered stacks arises from verti…
Heat-Assisted Multiferroic Solid-State Memory
Serban Lepadatu, Melvin M. Vopson
A heat-assisted multiferroic solid-state memory design is proposed and analysed, based on a PbNbZrSnTiO3 antiferroelectric substrate and Ni81Fe19 magnetic free layer. Information i…
Unified Treatment of Spin Torques using a Coupled Magnetisation Dynamics and Three-Dimensional Spin Current Solver
Serban Lepadatu
A three-dimensional spin current solver based on a generalised spin drift-diffusion description, including the spin Hall effect, is integrated with a magnetisation dynamics solver.…
Interaction of Magnetization and Heat Dynamics for Pulsed Domain Wall Movement with Joule Heating
Serban Lepadatu
Pulsed domain wall movement is studied here in Ni80Fe20 nanowires on SiO2, using a fully integrated electrostatic, thermoelectric, and micromagnetics solver based on the Landau-Lif…
Very low critical current density for motion of coupled domain walls in synthetic ferrimagnet nanowires
Serban Lepadatu, Henri Saarikoski, Robert Beacham +12
Domain walls in ferromagnetic nanowires are potential building-blocks of future technologies such as racetrack memories, in which data encoded in the domain walls are transported u…