A hysteresis model with dipole interaction: one more devil-staircase. Abstract Magnetic properties of 2D systems of magnetic nanoobjects (2D regular lattices of the magnetic nanoparticles or magnetic nanostripes) are considered. The analytical calculation of the hysteresis curve of the system with interaction between nanoob-jects is provided. It is shown that during the magnetization reversal s...

We study dynamic minimization problems of the calculus of variations with Lagrangian functionals containing Riemann–Liouville fractional integrals, classical and Caputo fractional derivatives. Under assumptions of regularity, coercivity and convexity, we prove existence of solutions. AMS Subject Classifications: 26A33, 49J05.

This paper outlines an energy-minimization finite-element approach to the computational modeling of equilibrium configurations for nematic liquid crystals under free elastic effects. The method targets minimization of the system free energy based on the Frank-Oseen free-energy model. Solutions to the intermediate discretized free elastic linearizations are shown to exist generally and are uniqu...

We discuss some recent developments in the study of regularity and stability for a first order Hamilton-Jacobi system: ∇u(x) ∈ K, where K is a closed set of n × m-matrices and u is a map from a domain Ω ⊂ R to R. For regularity of solutions, we obtain a higher integrability from a very weak integral coercivity condition known as the L-mean coercivity. For the stability, we study W sequences {uj...

SmCo5 based magnets with smaller size and larger maximum energy product have been long desired in various fields such as renewable energy technology, electronic industry and aerospace science. However, conventional relatively rough synthetic strategies will lead to either diminished magnetic properties or irregular morphology, which hindered their wide applications. In this article, we present ...

The microstructure and magnetic properties i.e. the initial permeability, magnetic &ereffect and coercivity for the asquenched and annealed at different temperatures s C U I N ~ & ~ 5B9 samples are studied After annealing the samples at 573 K for 1 h the decrease of the initial permeability and increase of the disaccommodation amplitude are o b s e ~ e d These are connected with a local anisotr...

Explosive shock compaction was used to consolidate powders obtained from melt-spun Pr2Fe14B/ –Fe nanocomposite ribbons, to produce fully dense cylindrical compacts of 17–41-mm diameter and 120-mm length. Characterization of the compacts revealed refinement of the nanocomposite structure, with approximately 15 nm uniformly sized grains. The compact produced at a shock pressure of approximately 1...

Ferrimagnetic Mn,N films were deposited on Si (100) substrate by dc reactive magnetron sputtering from sintered Mn target. Highly (002) textured Mn,N ordered phase is formed in situ at studied substrate temperatures of 150-250 “C without further annealing. Anomalous perpendicular magnetoanisotropy exists in these face-centered cubic films with larger coercivity measured perpendicular to the fil...

BaFe12-xCrxO19 (x = 0.0, 0.1, 0.2, 0.3, and 0.4) ferrite ceramics were prepared by a sol-gel method using spruce sapwoods as the templates. The prepared materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and a magnetic property measurement system (MPMS). The prepared materials maintained a multilayer wall structure of spruce sapwoods. All samples presen...

Thin films ofCo-W, 300-500 A thick, were electrodeposited at various compositions under a wide range ofplattng conditions. The saturation magnetization, coercivity, and squareness ratio of the films were derived from the parallel (in-plane) and perpendicular hysteresis loops, measured by using a vibrating sample magnetometer. The magnetic properties of the films are strongly related to their mi...