This paper is a report on the synthesis of the Fe3O4@Ag core-shell with high saturation magnetization of magnetite nanoparticles as the core, by using polyol route and silver shell by chemical reduction. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy analyses confirmed that the particles so produced were monophase. The magnetic properties of the product were investigated by...

Magnonic crystals are structures with periodically varied magnetic properties that used to control collective spin-wave excitations. With micromagnetic simulations, we study spectra in a 2D antidot lattice based on multilayered thin film perpendicular anisotropy (PMA). We show the modification of PMA near edges introduces interesting changes spectra, even fully saturated state. In particular, s...

Multipolarity remanence in greigite-bearing sediments has long been recognized, but the cause of this anomalous behavior is not well understood. Here, we use electron microscopic and magnetic analyses to investigate origin such multipolarity Miocene from Pannonian Basin (Hungary). We find a softening partial transformation iron sulfides magnetite pyrrhotite “single-polarity” “multi-polarity” sa...

The static and dynamic properties of skyrmions have recently received increased attention due to the potential application as information carriers for unconventional computing. While current-driven dynamics has been explored deeply, both theoretically experimentally, theory temperature gradient-induced dynamics---skyrmion caloritronics---is still at its early stages development. Here, we move t...

The two-plate initial boundary-value problem of Parker is reviewed, treating the relaxation a 3D magnetic field prescribed with an arbitrary topology to terminal force-free in cold, viscous, electrically perfect fluid conductor. Anchored by their foot-points at perfectly conducting rigid plates, relaxing preserves its topology. magnetostatic theorem states that for most topologies, must embed c...