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Effects of La Dopant on Nanocluster Size and Optical Band Gap of CdO Films Prepared by Sol-Gel Method

100%

Alahmed Z., Serbetçi Z., Yakuphanoglu F.

Acta Physica Polonica A

2013

vol. 124

issue 1

125-127

The undoped and lanthanum doped cadmium oxide thin films were prepared by sol-gel method. The CdO films were doped with various percentages of La, 0.1, 0.5, 1, and 2 at.%. We have investigated the structural properties of the CdO films by atomic force microscopy. The obtained results show that both the grain size and the surface roughness of CdO films reduce with increase of La doping content. Additionally, the result shows a significant decrease of the transmittance in the range of 300 to 500 nm with increase of La doping level. The optical band gap of CdO films increases with La doped CdO films. It was found that the band gaps to be 2.25, 2.36, 2.4, 2.28, and 2.31 eV for La contents with 0.1, 0.5, 1, and 2 at.% doped CdO, respectively.

Structural, Chemical Bonding, Electronic and Magnetic Properties of XY_{3} (X = Al, Ga and Y = V, Nb, Cr, Mo) Compounds

64%

Hafeez R., Murtaza G., Khenata R., Wong K., Naeem S., Khalid M., Alahmed Z., Bin Omran S.

Acta Physica Polonica A

2015

vol. 127

issue 3

770-779

The metallic behavior of the band gap of intermetallic compounds has large applications in superconductivity, nickel-metal hydrides batteries, semiconductors, and heating materials. The presence of transition elements makes them more attractive for magnetic applications. In this work we studied the structural, electronic, chemical bonding, and magnetic properties of binary intermetallic compounds XY_3 (X = Al, Ga and Y = V, Nb, Cr, Mo). These compounds were investigated by using full potential linearized augmented plane wave plus local orbitals method. The exchange correlation potential of generalized gradient is used. Our calculated lattice constants are in good agreement with experimental values. The band structures of these compounds are purely overlapping across the Fermi level. The bonding is mainly covalent in these compounds. The density of states of the compounds shows that the major contribution arises from d-states of anions. The investigation carried out shows that the most of these compounds have ferromagnetic nature, while few are diamagnetic. On the basis of this study it is expected that these compounds can be used as a best moulds for future study on similar compounds.

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2 Acta Physica Polonica A

1 2015

1 2013

2 Alahmed Z.

1 Bin Omran S.

1 Hafeez R.

1 Khalid M.

1 Khenata R.

1 Murtaza G.

1 Naeem S.

1 Serbetçi Z.

1 Wong K.

1 Yakuphanoglu F.

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Effects of La Dopant on Nanocluster Size and Optical Band Gap of CdO Films Prepared by Sol-Gel Method

Structural, Chemical Bonding, Electronic and Magnetic Properties of XY_{3} (X = Al, Ga and Y = V, Nb, Cr, Mo) Compounds