We present a method for the generation of high kinetic energy attosecond electron packets via magnetostatic and aperture filtering of conical surface plasmon (SP) accelerated electrons. The conical SP waves are excited by coupling an ultrafast radially polarized laser beam to a conical silica lens coated with an Ag film. Electromagnetic and particle tracking models are employed to characterize ...

In this paper, we demonstrate that field-coupled nanomagnets can be used for digital information processing. The operation of logic devices is based on a QCA-like architecture, where information propagates by magnetostatic interaction between individual magnetic dots. Micromagnetic simulations indicate that simple logic gates function properly. Efficient design tools, based on the single-domain...

We devise an efficient algorithm for the finite element construction of discrete harmonic fields and the numerical solution of 3D magnetostatic problems. In particular, we construct a finite element basis of the first de Rham cohomology group of the computational domain. The proposed method works for general topological configurations and does not need the determination of “cutting” surfaces.

Micromagnetic simulation results on dynamic hysteresis loops of clusters iron oxide nanoparticles (NPs) with internal structure composed nanorods are compared the widely used macrospin approximation. Such calculations allowing for nanorod-composed NPs is facilitated by a previously developed coarse-graining method based renormalization group approach. With focus applications to magnetic hyperth...

In vivo QSM in early-stage Alzheimer’s disease reveals magnetostatic alterations in the basal ganglia and beyond Julio Acosta-Cabronero, Guy B Williams, Arturo Cardenas-Blanco, and Peter J Nestor Brainplasticity & Neurodegeneration, German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Saxony-Anhalt, Germany, Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, Cambridges...