The effective large-scale Hamiltonian of a planar system of nano-loops in a weakly excited flux-closed magnetized state has been constructed by means of a perturbative technique based on micromagnetic theory. The Hamiltonian is written by means of two classes of collective variables: the continuous soft spins and discrete vorticity charges. Analytical and numerical calculations of the inter-loo...

It can be demonstrated experimentally that interaction between magnetostatic fields for which both poles geometrically coincide obeys the inverse cube law of attraction and repulsion with distance (far fields interaction law) which proves by similarity that localized (in the sense of behaving as if they were point-like) electromagnetic elementary particles must obey the same interaction law sin...

Abstmcr. The Cassini spaceaaft , launched in October 1997 to reach Saturn in 2004, carries two magnetometer xperiments on a lo-meter boo”, one at the mid-section of the boom and the other at the end of the boom. In order to gather valid scientific magnetic field data and avoid electromagnetic nterference, the spacecraft had to comply with stringent magnetostatic cleanliness requirements. Amidst...

The paper presents the solution of a three-dimensional (3-D) magnetostatic problem using the finite formulation of an electromagnetic field. Two different approaches, based on a primal-dual barycentric discretization of the 3-D space, are presented, considering as unknowns either the magnetic fluxes or the circulations of the vector potential. Results on simple reference configurations are repo...

The singular behaviour of the electrostatic dipole field is compared with that of the magnetostatic one, with pedagogical access to the difference between the two established without necessarily resorting to certain advanced differentiation identities involving delta functions. Such an approach may be more suitable for a regular curriculum in electrodynamics. It is rather common in many standar...

The paper deals with the analysis of clusters’ size in diverse magnetization states of a system of ferromagnetic particles organized in a perfect 2D array with all the anisotropy axes perpendicular to the plane (perpendicular medium) following the evolution of the clusters in correlation with various parameters like applied field or interaction strength. We present numerical simulations for a t...

Magnetostatic backward volume spin-wave SW pulses have been cloned and trapped through the use of multiple, properly timed, parametric pumping PP pulses. The experiment was done with 30-ns-wide pulses at 5 GHz in a 7.1m-thick yttrium iron garnet film. Well-timed, large-area, high-power, 2-ns-wide microwave pulses at 10 GHz were used to pump the SW pulses. The interaction between the initial SW ...

ABSTRACT Most fast radio burst (FRB) models are built from comparatively common astronomical objects: neutron stars, black holes, and supernova remnants. Yet FRB sources rare, most of these objects, found in the Galaxy, do not make FRB. Special rare circumstances may be required for objects to The recent discovery a repeating globular cluster belonging galaxy M81 suggests model involving star c...