We find numerically skyrmionic textures with skyrmion number $Q=0$ in ferromagnets the Dzyaloshinskii-Moriya interaction, perpendicular anisotropy, and magnetostatic field. These have a part an antiskyrmion part, they may be called chiral droplets. They are stable infinite film as well disk-shaped magnetic elements. Droplets found films for values of parameters close to transition from ferromag...

Theoretical modeling of the magnetic properties Fe 3 O 4 -Fe 3-x Ti x composites obtained by sol-gel method with subsequent hydrothermal treatment has been carried out. The magnetization reversal fields and number particles in different states an ensemble two-phase infinitely thin boundary between phases a characteristic size varying range from 30 to 80 nm were calculated using "magnet...

Here we report on the magnetostatic ring studies at Frankfurt University. The various effects arising by confinement of non-neutral plasmas in the longitudinal magnetic field were studied in the last 2 years. Subjects of detailed investigation were the behaviour of confined charged clouds in Gabor lenses[1] and solenoids, the consequences of a hollow density profile and of mirror charges on the...

This note presents the analysis, design, and performance characteristics of an rf Helmholtz coil facility. The facility was developed to measure the magnetic response of models up to two feet in size. Test measurements were made on metallic spheres and cylinders, and on a model F-106 aircraft over a 1-25 MHz frequency range corresponding to 20-520 kHz full scale. A large portion of the note is ...

The price of energy to separate tightly bound electron-hole pair (or charge-transfer state) and extract freely movable charges from low-mobility materials represents fundamental losses for many low-cost photovoltaic devices. In bulk heterojunction (BHJ) polymer solar cells (PSCs), approximately 50% of the total efficiency lost among all energy loss pathways is due to the photogenerated charge c...

In this paper, the temperature dependence of the hysteretic processes of Co nanowires, squarelly ordered in an array prepared by electrodeposition in nanopores of alumina membranes was analyzed. Both the magnetostatic interactions induced in the nanowires arrays and the thermal stresses radial, azimuthal and axial stresses , which appear during the cooling of the system nanowire and alumina tem...

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 ...