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Papers by Author: Noureddine Fenineche

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Structural, Electrical and Magnetic Investigations of Conductive ZnO: Co Thin Films Deposited by DC Reactive Magnetron Co-Sputtering

Authors: Soumia Lardjane, Mohammad Arab Pour Yazdi, Noureddine Fenineche, G. Merad, H.I. Feraoun, Alain Billard

Abstract: Zn_1-xCo_xO (0 < x < 14.6) diluted magnetic semiconductor coatings have been obtained by reactive DC magnetron sputtering of metallic Zn and Co targets at high pressure and high temperature. The coatings structural properties have been investigated by X-ray diffraction. All as-deposited coatings are crystalized in ZnO structure and neither traces of metallic nor oxide Co-rich clusters were detected in the films. The temperature dependence of the magnetization shows a paramagnetic Curie-Weiss behavior with antiferromagnetic interaction due to the associated spins and simple paramagnetic curie behavior of isolated free spins.

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Study of the early Stage of Deposition Process for Electrodeposited Ni_100-XFe_X Thin Films

Authors: Saci Messaadi, Mosbah Daamouche, Abderrahim Guittoum, Hadria Medouer, Noureddine Fenineche, Ibtissem Zidani

Abstract: The aim of this work is to understand the early stages in the growth mechanism of invar (Fe64Ni34) alloys and also to study the influence of potential on the evolution of their crystalline structures. Fe64Ni34 layers were deposited onto copper substrates under optimal conditions using the electrochemical method of cyclic voltammetry (CV) and chronoamperometry (CA). The influence of the potential is examined and the nucleation kinetics is discussed. In this purpose, the obtained experimental data was interpreted by applying useful theoretical methods developed by Scharifker and Hills. X-ray diffraction experiments were performed on all samples in order to follow the structural evolution of Fe64Ni34 layers as a function of the potential.