Perpendicular barium ferrite ~BaM! films with Pt interlayers were successfully fabricated. The magnetic and structural properties of BaM films were compared with BaM films without Pt interlayers. It was found that perpendicular c-axis orientation was greatly improved for films with Pt interlayers. Perpendicular remanent squareness is increased, and the c-axis dispersion angle Du50 is decreased ...

A two-dimensional micromagnetic model is extended to support simulation of films with non-uniform thickness. Zeeman and crystalline anisotropy energies of each cell scale with the cell thickness, while the exchange energy of a pair of neighbor cells scales by a weight dependent on the thicknesses of both cells. The self-magnetostatic energy is computed by scaling the moment of each cell by its ...

Magnetostatic coupling of Permalloy disk chains were studied by magnetic-force microscopy. The annihilation process occurs at the center of the chain, while nucleation initiates at the edge of the chain. The switching is strongly coupled along the chain direction.

Three-dimensional simulation of harmonic up generation in free electron laser amplifier operating simultaneously with a cold and relativistic electron beam is presented in steady-state regime where the slippage of the electromagnetic wave with respect to the electron beam is ignored. By using slowly varying envelope approximation and applying the source-dependent expansion to wave equations, el...

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...

The spectrum of spin waves (SW) tangentially magnetized films yttrium iron garnet (YIG) with a surface metastructure in the form gratings etched grooves period close to film thickness d (~ d) has been experimentally and numerically studied. It found that signal reflected from microstrip transducer width w>> d, located on YIG contains absorption lines associated excitation SW metas...