We have investigated the magnetic and structural properties of CoCrPt perpendicular films with respect to in situ interdiffusion of CrMn from top layers. We have observed a coercivity of 5700 Oe in the films with a thin CrMn overlayer, which is greater than two times larger than the similar type of films without a CrMn overlayer. This increment is attributed to the decoupling of grains by diffu...

In this work, rapid thermal annealing was performed on InGaAs/GaAs quantum dot infrared photodetectors QDIPs at different temperatures. The photoluminescence showed a blueshifted spectrum in comparison with the as-grown sample when the annealing temperature was higher than 700 °C, as a result of thermal interdiffusion of the quantum dots QDs . Correspondingly, the spectral response from the ann...

Ab initio calculations, based on pseudopotentials and density functional theory, have been performed to investigate the effect of hydrogenation on the atomic geometries and the energetics of substitutional boron on the generic Si(001)-(1 · 2) surface. For a single B atom substitution corresponding to 0.5 ML coverage, we have considered two different sites: (i) the mixed Si–B dimer structure and...

For prediction of polymer systems behavior on processing and exploiting stages knowledge of phase diagrams is very useful and in some cases – necessary. They characterize equilibrium phase states and for particular systems – phase structure. Among other methods to estimate compatibility of two substances including polymeric one, and consequently to obtain reasonable information about phase stat...

Interfaces formed during the co-curing of an aerospace grade epoxy resin in contact with PEI, PES, and PSU surfaces are examined in this work. The interface found in each scenario is characterized by optical microscopy, and low voltage Scanning Electron Microscopy (SEM) using Energy-Dispersive X-ray spectroscopy (EDX) where applicable. Atomic Force Microscopy (AFM) in tapping mode is also used ...

Proton implantation-induced intermixing of InAs quantum dots QDs capped with InP, GaInAsP, and InP and InGaAs layers grown by metal-organic chemical vapor deposition is investigated. The samples are annealed at 750, 800, 850, and 900 °C for 30 s and thermal stability of the QDs is studied. The optimum annealing temperature is around 800 °C which gives maximum implantation-induced energy shift. ...

This multi-layer program has examined the oxidation resistance of Al-rich coatings made by chemical vapor deposition and pack cementation on ferritic-martensitic (e.g. T91, Fe-9Cr-1Mo) and austenitic (Type 304L, Fe-18Cr-8Ni) substrates at 650°-800°C. The main goal of this work was to demonstrate the potential benefits and problems with alumina-forming coatings. To evaluate their performance, ox...

Annealing is one of the processing methods that are used for fabrication defect-free, photoactive perovskite films with compact grains in highly efficient and stable solar cells (PSCs). Thus, annealing temperature a key parameter control interdiffusion (of constituent elements) films. In this paper, we present results systematic study effects on elements formamidinium-based PSCs. We also explor...

Interdiffusion coefficients are key parameters for the solidification process of liquid alloys. However, determination interdiffusion in metals at high temperatures is a challenging and extensive task, due to variety potential systematic errors. In recent years we have developed an X-ray situ shear cell method measurement binary metallic melts. This technique enables monitoring experiment order...