2014 The phase diagram under pressure up to 4 kbar of an alloy containing 2.8 at % Fe in chromium has been determined by neutron diffraction. A hysteretic first order transition to a commensurate spin density wave phase, together with an apparently second order transition from the disordered paramagnetic phase to an incommensurate phase, is observed. No triple point could be found and there is ...

On base of Hamiltonian formalism, we show that Hopf bifurcation arrives, in the course of the system evolution, at creation of revolving region of the phase plane being bounded by limit cycle. A revolving phase plane with a set of limit cycles is presented in analogy with revolving vessel containing superfluid He 4. Within such a representation, fast varying angle is shown to be reduced to phas...

Any desired diffraction pattern can be produced in the Fourier plane by the specification of a corresponding input-plane transparency. Complex-valued transmittance is generally required, but in practice phase-only transmittance is used. Many design procedures use numerically intensive, constrained optimization. We instead introduce a noniterative procedure that directly translates the desired b...

Crystal structure and compressibility of potassium azide was investigated by in-situ synchrotron powder X-ray diffraction in a diamond anvil cell at room temperature up to 37.7 GPa. In the bodycentered tetragonal (bct) phase, an anisotropic compressibility was observed with greater compressibility in the direction perpendicular to the plane containing N3 ions than directions within that plane. ...

Abstract:  In this study, the change in the crystalline structure of gas hydrate was predicted for ternary mixture of methane-ethane-water. For this purpose, the tangent plane distance (TPD) minimization method was used. First, the calculations were performed for the binary mixtures of methane-water and ethane-water as the gas and liquid phases. The results show that for a binary mixture of th...

In order to establish the growth of nonpolar GaN templates for subsequent overgrowth via hydride vapor phase epitaxy (HVPE) or subsequent device epitaxy we studied the growth of a-plane oriented samples on r-plane sapphire via metal organic vapor phase epitaxy (MOVPE). The growth parameters like reactor pressure, growth temperature and V/IIIratio for the nucleation layer as well as for the GaN ...

This paper introduces a Relative Mapping Algorithm. This algorithm presents a new way of looking at the SLAM problem that does not use Probability, Iterative Closest Point, or Scan Matching techniques. A map of landmarks is generated by using the average relative location difference between landmarks. This means the algorithm does not use any known, estimated or predicted movement or position d...

We present the results of molecular dynamics (MD) simulations of hexane adsorbed onto graphite at submonolayer (ρ<1), monolayer (ρ=1), and supermonolayer (ρ>1) coverages. We find the presence of three phases, the low temperature solid herringbone (HB) phase, the intermediate-nematic (IN) phase, and the isotropic fluid phase. For submonolayer coverages, we find that the IN phase disappears excep...

Although lateral thermal conduction in Ge2Sb2Te5 (GST) films can influence the performance of phase change memory (PCM), there are no data available for the in-plane thermal conductivity. This work measures both the in-plane and the out-of-plane thermal conductivities for the amorphous, face-centered-cubic, and hexagonal-close-packed phases of GST using two independent techniques. For crystalli...

Abstract On the basis of angular spectrum representation, a formalism describing paraxial beams propagating through an isotropic left-handed material (LHM) slab is presented. The treatment allows us to introduce the ideas of beam focusing and phase compensation by LHM slab. Because of the negative refractive index of LHM slab, the inverse Gouy phase shift and the negative Rayleigh length of par...