ibrabbas7

Prof. Dr. Ibrahim A. Abbas

Professor - Department of Mathematics

Faculty of science

Address: Sohag University, Egypt.

219

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Publications Which contain the keyword: electrical properties


Electrical, thermoelectrical and magnetic properties of approximately 20-nm Ni-Co-O nanoparticles and investigation of their conduction phenomena
Understanding the properties of semiconductor nanostructures is important for developing their practical applications in the nanodevices. Although the electrical properties of spinel oxides containing Ni and Co have been studied extensively over the last decades, there is still a significant disagreement on their electrical conduction mechanisms and the distribution of the various charge states of Co and Ni in the ... Read more

Sonochemical synthesis, structural inspection and semiconductor behavior of three new nano sized Cu(II), Co(II) and Ni(II) chelates
Three novel nanosized Cu(II), Co(II) and Ni(II) complexes of imine ligand attained from the condensation of 2‐amino‐3‐hydroxypyridine and 3‐methoxysalicylaldehyde have been prepared and investigated using diverse chemical methods such as NMR, CHN analysis, conductance, IR, Spectral studies, TGA and magnetic moment measurements. The obtained data confirmed that the synthesized complexes have metal: ligand ratio of 1:1 and octahedral geometry for ... Read more

The electric and thermoelectric properties of Cu(II)-Schiff base nano-complexes
have been widely investigated. However, their thermoelectric (TE) properties remain unreported. This work presents Cu(II)-Schiff base complexes as promising materials for TE power generation. Therefore, three Cu(II)-Schiff base complexes (namely, [Cu(C32H22N4O2)].3 2H2O, [Cu(C23H17N4O7Br)], and [Cu(C27H22N4O8)].H2O) have been synthesized in nanosized scale. The electric and TE properties have been studied and comprehensive discussions have been presented to promote the nano-complexes (NCs) ... Read more

Influence of heat treatment on the magnetic and magnetocaloric properties in Nd0.6Sr0.4MnO3 compound
In the present investigation, the effect of annealing temperature on the structural, electrical transport and the magnetocaloric effect of Nd0.6Sr0.4MnO3manganites have been studied. Rietveld refinement of XRD data reveals that all samples are single phase with a space group (Pnma). Heat treatment enhances the grain size and decreases the porosity. All samples suffer Curie transition from ferromagnetic to paramagnetic. Magnetocaloric ... Read more

Sonochemical synthesis, structural inspection and semiconductor behavior of three new nano sized Cu(II), Co(II) and Ni(II) chelates based on tri‐dentate NOO imine ligand as precursors for metal oxides
Three novel nanosized Cu(II), Co(II) and Ni(II) complexes of imine ligand attained from the condensation of 2‐amino‐3‐hydroxypyridine and 3‐methoxysalicylaldehyde have been prepared and investigated using diverse chemical methods such as NMR, CHN analysis, conductance, IR, Spectral studies, TGA and magnetic moment measurements. The obtained data confirmed that the synthesized complexes have metal: ligand ratio of 1:1 and octahedral geometry for ... Read more

Effect of oxidation time on structural, optical and electrical properties of mixed copper oxides nanocrystallites
Mixed nanocrystalline copper oxides were prepared from pre-sputtered copper films at 500 °C for various oxidation times. Mixed orthorhombic Cu64O and monoclinic CuO phases with CuO phase ration varied from 57.8 to 90.8% were obtained upon varying the oxidation time from 1 to 3 h. SEM observations revealed the nanocrystallites morphologies for the oxidized films. The film oxidized for 1 ... Read more

2018-09-23 20:05:49 Keywords electrical properties,
Structural and electrical properties of In35Sb45Se20−xTexchalcogenidethin films.
The structural and electrical properties of the as-prepared and annealed In45Sb35Se20−_x_Te_x_ thin films with different compositions (_x_ = 2.5, 5, 7.5, 10, 12.5 and 15 at.%) prepared by electron beam evaporation method are studied. The XRD patterns of the as-prepared thin film show that the investigated compositions have amorphous and polycrystalline structure depending on the Te content. After annealing the ... Read more