The magnetocaloric effect (MCE) and electric-dielectric properties of the Nd-cobaltate perovskitesNd0.6Sr0.4Co1xMnxO3(x = 0, 0.3, 0.7 and 1) were investigated for possible use in magnetic cooling appli-cations. Upon Mn substitution, the magnetic exchange interaction is affected by the (Mn4+/Mn3+) ratio,which in turn impacts several physical properties. The XRD patterns of the synthesized compositesrevealed a single phase with an orthorhombic structure with ... Read more

Nanocrystalline Sn1-xFexO2 (where x = 0, 0.01, 0.02, 0.03 and 0.04) powders have been successfully synthesized by the hydrothermal method followed by sintering at 1000 C for 3 h. The morphology and structure of the samples have been analyzed by field emission scanning electron microscope and X-ray diffraction, respectively. X-ray diffraction results revealed that all diffraction peaks positions agree well ... Read more

In this work, Sn1−xFexO2 (x = 0.00, 0.02, 0.04, 0.06 and 0.08) nanoparticles have been synthesized using ball-milling method. The average diameter of the nanoparticles decreases from 487 to 216 nm by adding Fe2O3 to the tin dioxide. The X-ray diffraction analyses confirms formation of tetragonal structure which is typical feature of SnO2 compounds. Theoretical density was found to be ... Read more

Thermoelectric properties of Pb1–xSnxTe (0.00 ≥ x ≥ 0.08) alloys synthesized by melting-quenching-annealing method have been investigated. The sample structure and phases have been investigated by Raman spectroscopy and X-ray diffraction, while the morphology and stoichiometry have been studied by SEM and EDX. The nanomaterial exists in a single phase and has a facecentred cubic (fcc) lattice of rock-salt type ... Read more

The present work deals with the structural, optical and electrical characterization of PbSe thin films with variable thickness deposited on well-cleaned glass substrates by electron beam evaporation technique at room temperature (RT). Grown films are characterized by X-ray diffraction, energy dispersive spectroscopy, resistivity measurements (from room temperature to 200 °C) and optical measurements at room temperature in order to study ... Read more

The structural and thermoelectric properties of Sb65GexSe35-x within (0 x 20 at.%) were investigated. Samples were synthesized from high purity elements by the melt quenching technique. The morphology and composition were determined using field emission scanning electron microscope (FESEM) and energy dispersive spectroscopy (EDS). Variation of the Ge composition within these compounds was demonstrated by X–ray diffraction (XRD) on (XRD) ... Read more

InxBi40−xSe60 (x = 1.6, 4.4, 7, 10 and 13.2) alloys were synthesized by melt-quenching technique. The X-ray diffraction and Raman spectroscopy investigations confirm that the materials are in single phase. Archimedes method and Energy Dispersive Spectroscopy (EDS) have been used for density and chemicalcharacterization of the obtained materials. Indium content dependences of different parameters such asthe density (D), the compactness ... Read more

Polycrystalline samples of Eu0.65Sr0.35FexMn1−xO3 (x = 0.1 and 0.5) were prepared by a solid state reaction technique. Preliminary microstructure and crystal structure of the compound at room temperature were studied using field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) technique, respectively. It is found that with Fe doping, the grain size decreases, where the compound crystallizes in a ... Read more

Sb65Se35−xGex (x = 0–20 at.%) thin films, prepared by the electron beam evaporation technique on ultrasonically cleaned glass substrates at 300 K, were investigated. The amorphous structure of the thin films was confirmed by x-ray diffraction analysis. The structure was deduced from the Raman spectra measured for all germanium contents in the Sb–Se–Ge matrix. The absorption coefficient (α) of the ... Read more

The influence of thermal treatment between 1273 and 1333K in an oxygen atmosphere on the perovskite system RuSr2GdCu2O8 was studied by X-ray diffraction (XRD), scanning electron microscopy, electrical resistivity and Seebeck coefficient measurements. The XRD patterns revealed that the phase purity depends on the sintering process. The samples were found to exhibit very small crystallite sizes in the nanometer range. ... Read more