We report on continued measurements using an experimental model system to quantify intergranular exchange coupling in CoCrPtoxide perpendicular magnetic recording media. A thin film multi-layered structure comprising a high coercivity CoPt unicrystal layer separated from a low coercivity CoPt layer by a thin oxide interlayer is used to model the vertically aligned grains separated by oxide boun...

Various coercivity conditions appear in the literature in order to guarantee solutions for the Variational Inequality Problem. We show that these conditions are equivalent to each other and that they are not only sufficient, but also necessary for the set of solutions to be non-empty and bounded.

In this paper, we consider strong form of a vector equilibrium problem and establish some existence results for solutions of such problem in the setting of topological vector spaces. We provide several coercivity conditions under which strong vector equilibrium problem has a solution. Our results generalize and extend the results of Bianchi and Pini [Coercivity conditions for equilibrium proble...

magnetic cufe2o4 nanoparticles were synthesized by a facile microwave-assisted reaction between cu(no3)2 and fe(no3)3. the magnetic nanoparticles were added to starch to make magnetic polymeric nanocomposite. the nanoparticles and nanocomposites were characterized using x-ray diffraction and scanning electron microscopy. the magnetic properties of the samples were investigated using an alternat...

The paper reports correlation between processing, structural and magnetic properties of cobalt nanoparticles dispersed in an insulating oxide matrix. High-temperature, chemical decomposition approach was utilized to achieve highly-dispersed, ultra-fine cobalt nanoparticles in silica matrix. Synthesis parameters such as precursor to passivating agent ratio were designed to control the metal-to-o...

bled re of along llel to ature while ature polar with . The de of Microstructure and magnetic properties of ferromagnetic Co9Pt nanowire arrays electrodeposited into self-assem anodic alumina templates have been investigated. X-ray diffraction shows that as-prepared Co–Pt nanowires a FCC polycrystalline structure. The nanowires with diameter do80nm are mainly of (1 1 1) preferred orientation th...

We describe structural and magnetic measurements of polycrystalline, L10 chemical-ordered Fe(55-60)Pt(45-40) lms as a function of lm thickness (from 3 to 13 nm) and growth temperature (270 370 C). With increasing lm thickness, the coercivity increases from about 1 kOe up to 11 kOe (growth at 400C), while for increasing growth temperature, the coercivity grows from 0.2 to 6 kOe for 4.3 nm thick ...

Low coercivity is the main disadvantage of RE-Fe-B permanent magnets containing highly abundant rare earths (RE: La, Ce) from the application point of view, even though they exhibit many cost and resource advantages. In this work, an industrial mixed rare earth alloy (RE100 = La30.6Ce50.2Pr6.4Nd12.8) with a high amount of the more abundant elements was adopted to fabricate RE-Fe-B permanent mag...

Keywords: Elliptic equations Nonlocal boundary value problems Difference schemes Stability a b s t r a c t The well-posedness of the Bitsadze–Samarskii type nonlocal boundary value problem in Hölder spaces with a weight is established. The coercivity inequalities for the solution of the nonlocal boundary value problem for elliptic equations are obtained. The stable second order of accuracy diff...