Abstract The aim of the paper is to recover some results Cardaliaguet–Nolen–Souganidis in Cardaliaguet et al. (Arch Rat Mech Anal 199(2): 527–561, 2011) and Xin–Yu Xin Yu (Commun Math Sci 8(4): 1067–1078, 2010) about homogenization G-equation, using different simpler techniques. main mathematical issue lack coercivity Hamiltonians. In our approach we consider a multivalued dynamics without peri...

Sputtering pressure effects and temperature-dependent magnetism of Co/Pd multilayers" (1994). David Sellmyer Publications. Paper 102. The temperature dependence of the sputtering Ar pressure effects on magnetic properties and the coercivity mechanism of Co(2 &/Pd(13 A) multilayers were studied as the sputtering Ar pressure varied from 3-15 mTorr and the temperature from 300 to 35 K. It is found...

We present an experimental model system that enables quantitative assessment of intergranular exchange coupling in CoCrPt-oxide perpendicular magnetic recording media. A thin film structure consisting of a high coercivity CoPt unicrystal layer and a lower coercivity CoPt layer separated by a thin oxide interlayer is used to model perpendicularly magnetized grains separated by oxide grain bounda...

It is commonly known that the coercivity (H c ) of rare-earth/transition-metal (RE–TM) compound tuned based on varying RE content as compared to TM component. The drawback this approach H changes are permanent. In work, we investigate behaviors GdFeCo/Hf/MgO heterostructure where heavy metal Hf layer inserted in middle not only convert charge current into spin but also prevent oxygen diffusion ...

Many interesting properties of polynomials are closely related to the geometry of their Newton polytopes. We analyze the coercivity on R of multivariate polynomials f ∈ R[x] in terms of their Newton polytopes. In fact, we introduce the broad class of so-called gem regular polynomials and characterize their coercivity via conditions imposed on the vertex set of their Newton polytopes. These cond...

It was observed that the coercivity of CoCrPt films deposited on a polyimide tape was much lower than the coercivity deposited on a rigid glass substrate under identical conditions. X-ray diffraction showed that the desirable ~112! and ~110! texture of the NiAl/CrMn underlayers on the tape substrate was severely degraded during the deposition process. This resulted in the destruction of ~10.0! ...

Local coercivity variation of Co/Pd nanomultilayers has been investigated by measuring the polar Kerr hysteresis loops of the local areas of submicron size using a magneto-optic Kerr microscope system. Interestingly, the local coercivity distribution was very sensitive to an increase in the number of repeats: the ~2 Å Co/11 Å Pd)10 sample showed a smooth variation of the local coercivity, while...

The effects of Nd2Fe14B grain size and Nd coating on the coercivity in sputter-deposited Nd-Fe-B/Nd thin films have been investigated in order to gain an insight into the coercivity mechanism of Nd-Fe-B magnets. Highly textured Nd2Fe14B particles were grown successfully on the MgO(100) single-crystal substrate with the Mo underlayer. As the Nd-Fe-B layer thickness t NFB was decreased from 70 to...

Structural and magnetic properties of laminated sNd,DydsFe,Co,Nb,Bd5.5 /Fe nanocomposites are investigated. Normally, the addition of the soft phase to the hard phase enhances the remanence but deteriorates the permanent-magnet performance of the material by reducing the coercivity. In the present system, the coercivity increases to 1608 kA/m s20.2 kOed in thermally processed Nd–Dy–Fe–Co–Nb–Bs1...