Abderrahim Guittoum

• PhD
• Expert researcher- Directeur de Recherche at Nuclear Research Centre of Algiers

Mössbauer spectroscopy (MS), was used to characterize the synthesized materials prepared from the elemental powders by hydrothermal method which are binary iron-based nanoparticles (NPs) Fe15Co85 and Fe10Co90 alloys. The transmission ⁵⁷Fe Mössbauer spectra were measured at room temperature RT (T~300K), using ⁵⁷Co γ-ray source with an Activity ~ 1.8...

We have successfully synthesized FeCr nanostructured powders via a high-energy ball milling process. The effect of the chromium (Cr) concentration on the structural, magnetic, and hyperfine properties of Fe100−xCrx (x = 2.5, 7.5, 12.5, 17.5, and 20 at.%) nanostructured powders were investigated. For the low Cr concentrations, the X-ray diffraction...

This paper represent a description of the ICCAP'2023 conference, editors, and all others details.

This paper utilizes COMSOL software to conduct comprehensive simulations and analyses to evaluate the Micro-Electro-Mechanical System (MEMS) capacitive pressure sensor's performance with and without packaging. The study evaluates the influence of the compatibility of material physical properties, focusing on molybdenum and tungsten. The evaluation...

In this work, we investigated the effect of substrate on the structural, morphological, and magnetic properties of electrodeposited CoNi thin films from a chloride bath. Three samples of CoNi films were deposited at room temperature onto different substrates: FTO, ITO, and Cu. Electrochemical studies were performed using cyclic voltammetry experime...

The effect of iron content on the structure, morphology and magnetic properties of (Ni[Formula: see text]Co[Formula: see text])[Formula: see text]Fe[Formula: see text] powders synthesized by hydrothermal method has been studied. Several samples have been elaborated for different Fe content ([Formula: see text] = 0, 3, 5, 7, 10 and 13.5). The as- pr...

The monitoring of the alpha irradiation effect on the microstructural deformation of CR39 via the variation of free volumes has been studied. CR39 samples have been irradiated with alpha particles at fluencies Ф of 2.6 · 108, 5.27 · 108, 7.91 · 108, 1.3 ·109, 1.84 · 109, and 3.6 · 109 α/cm2. The samples have been investigated with positron annihila...

In this study, chitosan nanoparticles (ChNs) were used as an adsorbent for single and simultaneous uptake of cationic (methylene blue (MB)) and anionic (methyl orange (MO)) dyes. ChNs were prepared based on the ionic gelation method using sodium tripolyphosphate (TPP) and characterized by zetasizer, FTIR, BET, SEM, XRD, and pHPZC. The studied param...

Positron annihilation lifetime spectroscopy was used to investigate the microstructure of commercial Cu–Cr–Zr and Ni–W ultrafine-grained alloys processed by severe plastic deformation namely equal channel angular pressing, accumulative roll bonding and groove pressing and annealing at 600, 900 and 1000°C. All the lifetime spectra bear the same tren...

Optimization of chitosan nanoparticles (ChNs) production process employing a 2(5–2) fractional factorial design was performed to analyze the influence of viscosity average molecular weight (40–120 kDa), the initial concentration of chitosan (2–5 g/L), the initial tripolyphosphate (TPP) concentration (0.8–1.2 g/L), the ratio chitosan/TPP (4/1–10/1)...

Fe(Ni, Si) solid solutions were elaborated by high energy mechanical alloying from elemental Fe, Ni and Si powdersfor a milling time of 72 h. From X-ray diffraction (XRD) analysis, it has been shown that the Fe(Ni, Si) samples present a single phase in the whole range of Si content and exhibit a solid solution of disordered bcc α-Fe. The lattice pa...

Background/Purpose: The objectives of the present work are the preparation of chitosan in the form of nanoparticles (physical modification) and the grafting copolymerization of obtained nanoparticles with acrylic monomer. Gamma-radiation is chosen as a convenient and efficient method to induce the grafting reaction. Materials & Methods: In this wor...

A nanostructured nickel–iron alloy having the Ni40Fe60 composition was prepared through the mechanical alloying of the elemental powders in a high-energy ball mill P7 under an argon atmosphere. The microstructural, structure defects, and hyperfine properties during mechanical alloying were characterized by X-ray diffraction, scanning electron micro...

Optimization of chitosan nanoparticles (ChNs) production process employing a 2 (5-2) fractional factorial design was performed to analyze the influence of viscosity average molecular weight (40-120 kDa), the initial concentration of chitosan (2-5 g/L), the initial Tripolyphoshate (TPP) concentration (0.8-1.2 g/L), the ratio Chitosan/TPP (4/1-10/1)(...

CoNi films were elaborated by electrodeposition onto FTO substrates using a chloride bath with a metallic ion molar ratio [Co2+]/[Ni2+] equals 1/1. Three samples were elaborated for different potentials ranging from −1.6 to −1.5 V. The structure and the morphology of CoNi films were studied using X-ray diffraction (XRD), scanning electron microscop...

3rd International Conference on Radiations and Applications ICRAA3

Ni thin films have been electrodeposited on [Formula: see text]-Si (100) substrates for different deposition times at a fixed potential of 2[Formula: see text]V. The as-elaborated films have been characterized by Rutherford backscattering spectroscopy (RBS), X-ray diffraction (XRD), atomic force microscopy (AFM) and vibrating sample magnetometry (V...

Nanocrystalline Ni75Fe25 (Ni3Fe) powders were prepared by mechanical alloying process using a vario-planetary high-energy ball mill. The intermetallic Ni3Fe formation and different physical properties were investigated, as a function of milling time, t, (in the range 6 to 96 h range), using X-Ray Diffraction (XRD) and Mössbauer Spectroscopy techniq...

This article was focused on the elaboration of NiFi-Polyaniline glucose sensors via electrochemical technique. Firstly, the PANi (polyaniline) fibers were synthesized by oxidation of the monomer aniline on FTO (fluorine tin oxide) substrate. Secondly, the Nickel-Iron nanoparticles (NiFe (NPs)) were obtained by the Chronoamperometry method on the Po...

We have investigated the effect of the Nickel concentration on the crystal structure and microstructure, as well as on the hyperfine and magnetic properties of nanostructured (Fe0.7Al0.3)100-xNix powders (x = 0, 5, 10 and 15 at.%) fabricated by mechanical alloying. After 72 h of milling, all the Fe(Al, Ni) samples are single-phase disordered solid...

We report on the synthesis of Co30Ni70 nanoparticles using hydrothermal method at low temperatures and short times (100 °C, 2 h) without any surfactant or external magnetic field. The effect of NaOH concentration on the crystal structure, microstructure, and magnetic properties of CoNi samples has been investigated by x-ray diffraction (XRD), scann...

Cold-worked Zircaloy-4, used for the fuel grid of research reactors, was irradiated with 20 MeV Cu ions at different doses varying from 0.007 to 0.15 displacements per atom (dpa) at room temperature. The microstructure evolution was investigated by grazing X-ray diffraction and positron annihilation spectroscopy techniques (PAS). The mechanical pro...

Nanostructured (Fe0.6Al0.4)100-xSix powders with x= 0, 5, 10, 15 and 20 at.% were elaborated by means of mechanical alloying for a fixed milling time of 72 h. We have investigated the effect of silicon addition on the microstructure and magnetic properties of these ternary alloys. X-ray diffraction experiments reveal that these powders are single-p...

The Magneto-Optic Kerr Effect (MOKE) technique has been used to investigate the magnetic properties of Ni thin films, with thickness t ranging from 9 to 163 nm, evaporated onto several substrates (glass, Si (111), mica and Cu) with and without an evaporated Cu underlayer. The MOKE observations were correlated with the surface morphology inferred fr...

The book of abstracts contains all the contributions related to the international workshop on magnetic materials and nanomaterials organized between 01 to 04 october 2018 à Boumerdes University: http://mmn2018.univ-boumerdes.dz This version is also available on the website.

We have successfully synthesised Ni75Fe25 nanostructured powders by means of low temperature (150 °C) hydrothermal method using sodium hydroxide (NaOH) as co-reduction agent. The powders are in fact large agglomerations of small nanoparticles with average diameters below 30 nm. The concentration of NaOH seems to play an important role in the final...

2nd International Workshop on Magnetic Materials and Nanomaterials October 1-4, 2018 | Boumerdes - Algeria (http://mmn2018.univ-boumerdes.dz) From the 1st to the 4th of October 2018, we will organize the second international workshop on magnetic materials and nanomaterials, MMN2018. Topics of MMN'2018: Topic 01: Elaboration of magnetic thin...

Detailed characterization was carried out on an iron phosphate glass waste form containing 20 wt.% of Ce-rich complex nuclear waste mixture. The Fe3+/Fe ratio of this waste loaded iron phosphate glass was investigated using Mössbauer spectroscopy, which reveals the presence of iron cations in two different oxidation states (Fe2+ & Fe3+) and all Fe2...

Pure NiCo nanoparticles with different compositions were synthesized by hydrothermal route at 100∘C during 2 h. From x-ray diffraction analysis, we have shown that the structure varies from face-centered cubic (FCC) phase to a mixture of FCC and hexagonal close-packed (HCP) phases depending on the composition. For all CoxNi100−x powders, the micros...

We have studied the effect of thickness on the structural, microstructural, electrical and magnetic properties of Ni films electrodeposited onto n-Si (100) substrates. A series of Ni films have been prepared for different potentials ranging from -1.6V to -2.6V. Rutherford backscattering spectrometry (RBS), X-ray diffraction (XRD), four point probe...

In the present work, nanocrystalline (Fe70Al30)100-xSix (x=0, 5, 10, 15 and 20 at.%) powders were prepared by mechanical alloying for a fixed milling time of 72 h. The powder samples were characterized in terms of structural evolution, morphological changes and magnetic behavior. The X-ray diffraction measurements reveal that all the samples are of...

We have studied the effect of the silicon concentration on the structural and hyperfine properties of nanostructured Fe100−xSix powders (x=10, 20, 25 and 30at.%) prepared by mechanical alloying. The X-ray diffraction (XRD) studies indicated that after 72h of milling, the solid solution bcc-α-Fe(Si) is formed. The grain sizes, 〈D〉 (nm), decreases wi...

Single-phase (Fe0.7Co0.3)100-�xSix nanostructure powders (x = 0, 5, 10, 15 and 20) have been elaborated by mechanical alloying in order to investigate the effect of silicon on the microstructure and magnetic properties of these alloys. A disordered Fe(Co,Si) solid solution with body centered cubic (bcc) crystal structure is formed after 72 h of m...

We study the effect of thickness on the structural and magnetic properties of permalloy thin films, evaporated on glass substrate. The films thicknesses range from 16 to 90 nm. From X-ray diffraction spectra analysis, we show that the thinner films present a 1,1,1 Preferred orientation. However, the thicker films exhibit a random orientation. The g...

The mechanical alloying (MA) of elemental powder mixtures of Fe90Mg10 (atomic ratio of 79.67:20.33) was performed in an argon atmosphere using a planetary ball mill process. The alloy formation and the different physical properties were investigated as a function of milling time, t (in the 0–54h range) by means of the X-ray diffraction (XRD) techni...

Nanocrystalline Fe90Ni10 alloys were synthesized by mechanical alloying, starting from a powder mixture of elemental Fe and Ni. The phase evolution and magnetic properties were investigated, as a function of milling time, using the X-ray diffraction (XRD), the vibrating sample magnetometer (VSM), and the 57Fe Mössbauer spectroscopy. From XRD result...

We report on how the microstructure and the silicon content of nanocrystalline ternary (Fe0.8Al0.2)100–xSix powders (x=0, 5, 10, 15 and 20 at%) elaborated by high energy ball milling affect the magnetic properties of these alloys. The formation of a single-phase alloy with body centred cubic (bcc) crystal structure is completed after 72 h of millin...

We report the effect of deposition potential on the morphology, structure and magnetic properties of Ni80Fe20 (Permalloy: Py) deposits, elaborated by electrochemical process onto silicon nanowires (SiNWs). The morphology of SiNWs and Py/SiNWs were performed with scanning electron microscopy (SEM). The SEM micrographs reveal the formation of SiNWs a...

Powder samples containing high purity nickel nanoparticles (NPs) were prepared by hydrothermal method from Ni(II) chloride hexahydrate (NiCl2·6H2O) under the presence of sodium hydroxide (NaOH) with different concentrations between 5 and 25 mol/L. The synthesis of the NPs occurs through chemical reduction at relatively low temperature (140 °C). The...

Permalloy (Py) thin films were evaporated from nanocrystalline soft Ni 75 Fe 25 powder onto glass and Al 2 O 3 substrates. The thicknesses of these films range from 16 nm to 250 nm. The as deposited films were characterized by grazing incidence X-ray diffraction (GIXRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and vibratin...

Magnetic properties of bcc and bcc-fcc Fe-Pd alloys produce by thermal evaporation technique

Structural andMo¨ssbauer studies of evaporated Fe100�xPdx thin films

Structural, electrical and magnetic properties of evaporated permalloy thin films: effect of substrate and thickness

In this present work we examine the effect of the Ni thickness t (t ranges from 4 to 67 nm) and of the Cu underlayer (with tCu = 27, 52 and 90 nm) on the structural and magnetic properties of Ni/Cu bilayers deposited onto CuZn substrate. The Ni films and the Cu underlayer have been deposited by thermal evaporation. The structural properties were de...

We report on the structural, microstructural and magnetic properties of Ni75Fe25 permalloy (Py) thin films. Py thin films with different thicknesses were deposited by vacuum evaporation from nanocrystalline powder onto Si (11) substrate. The thickness varies from 16 nm to 250 nm. From grazing X-ray diffraction patterns (GIXRD), we have shown the pr...

Powders Mixture of monoclinic ZrO2 and 3 mol% Y2O3 were prepared by high-energy ball milling. Ball-milled products were investigated by means of X-ray diffraction, Rietveld refinement, spectrophotometry and Mössbauer spectroscopy. The tetragonal Zr1–xYxO1.982 (x=0.037) was formed within 30 min of ball milling in which the crystallite size decreases...

A particular interest has been given to the study of Fe100-xPdx (x=15, 20 and 36) alloys. Alloy thin films, obtained by thermal evaporation technique, have been investigated by X-ray diffraction, magnetization and Mössbauer effect measurements. All of these alloys are crystalline: a bcc phase for x=15 and a bcc-fcc mixed phases for x=20 and x=36.Th...

In order to study the influence of palladium atom on structural and hyperfine properties, Fe100-xPdx films (x = 15, 20 and 36 at.%) were deposited by evaporation method onto a Si (1 0 0) substrate. They were then characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and conversion electron Mössbauer spectroscopy (CEMS). X-ray...

Perpendicular Silicon nanowires (SiNWs), having 20 micrometer in length, were fabricated by metal assisted chemical etching of n-type Si(100) wafers in aqueous HF-solution. In a second step, NiFe films were electrodeposited onto theses SiNWs. The structure and magnetic properties of as deposited NiFe layers were studied by X ray diffraction (XRD)...

We report on the crystal structure, microstructure and magnetic properties of Ni nanoparticles (NPs), with an average diameter of around 40 nm, produced by hydrothermal method. A series of Ni powders was synthesized at relatively low temperature (140 °C) by varying the NaOH concentration. The crystal structure, microstructure and magnetic propertie...

The aim of the present work is to elaborate nanocrystalline soft Fe80Ni20 powders and to study the relationship between their magnetic behaviour and structural changes after different milling times. A series of Fe80Ni20 powders were elaborated by the mechanical alloying process for milling time ranging from 3 to 25 h. X-ray diffraction results show...

The mechanical alloying process was used to prepare nanocrystalline Ni75Fe25 powders. Several milling times have been used ranging from 3 h up to 96 h. The microstructure, structure and magnetic properties were studied by scanning electron microscopy, X-ray diffraction, and hysteresis measurements. From X-ray diffraction spectra, we showed that the...

Fex Co1–x alloys have been deposited by coevaporation onto oxidized Si(100) and float glass substrates. The atomic composition has been evaluated from EDX and RBS analysis. From X-ray diffraction spectra, we show the coexistence of bcc and fcc phases for some compositions. All the films present almost (110) and (211) textures with a grain size vary...

Cobalt–Molybdenum (Co–Mo) induced electrodeposition has been studied from a sulphate bath on Ru electrodes at pH 4. The conditions of electrodeposition of Co–Mo alloys were determined using the cyclic voltametry at different ions concentration ratios. The theoretical model of Scharifker-Hills was used to analyse the current transients for studying...

Iron-Nickel alloys are of great commercial interest as result of their magnetic properties. The aim of this work is to understand the early stages in the growth mechanism of Ni100-xFex, (X ∼ 64) alloys and also to study the influence of potential on the evolution of their crystalline structures. Ni100-xFex layers were deposited onto copper substrat...

Ni-Fe alloys ranging in composition of Fe rich invar (Ni 100-xFeX, where x ∼ 64), have a variety of high technology applications due to their wide spectrum of physical properties. In this paper, the effects of the applied potential (-1.20 V, -1.35 V) and the bath composition (0.1 M, 0.01 M) of the Ni-Fe alloy thin films are studied. Ni 100-xFeX lay...

We have studied the effect of milling time on the structural and hyperfine properties of Fe70Al30 compound elaborated by mechanical alloying. The elaboration was performed with a vario-planetary ball mill P4 at different milling times. The milled powders were characterized by X-ray diffraction (XRD) and Mössbauer spectroscopy. From XRD diffraction...

Nanocrystalline Fe100-xAlx powders (x= 25, 30, 34 and 40 at %) were prepared by the mechanical alloying process using a vario-planetary high-energy ball mill for a milling time of 35 h. The formation and physical properties of the alloys were investigated as a function of Al content by means of X-ray diffraction, scanning electron microscopy (SEM),...

We have studied the effects of the substrate and the thickness on the structural, electrical and magnetic properties of permalloy thin films Ni81Fe19 (Py). Series of Py thin films were evaporated on four various substrates: glass, kapton, Si(1 0 0) and Si(1 1 1). The thickness ranges from 13 nm to 190 nm. We show that evaporated permalloy on kapton...

Nanocrystalline Fe72Al28 alloy samples were prepared by mechanical alloying process using planetary high-energy ball mill. The alloy formation and different physical properties were investigated as a function of milling time, t, (in the 0-24 h range) by means of X-ray diffraction technique, scanning electron microscopy (SEM), energy dispersive X-ra...

Ni-Fe alloys ranging in composition of Fe rich invar (Ni100-xFeX, where x ~ 64), have a variety of high technology applications due to their wide spectrum of physical properties. In this paper, the effects of the applied potential (-1.20V, -1.35V) and the bath composition (0.1M, 0.01M) of the Ni-Fe alloy thin films are studied. Ni100-xFeX layers we...

The arm 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 chrono...

Nanostructured Fe50Co50 powders were prepared by mechanical alloying of Fe and Co elements in a vario-planetary high-energy ball mill. The structural properties, morphology changes and local iron environment variations were investigated as a function of milling time (in the 0–200h range) by means of X-ray diffraction, scanning electron microscopy (...

Series of Fe thin films have been prepared by thermal evaporation onto glass and Si(100) substrates. The Rutherford backscattering (RBS), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and the four point probe techniques have been used to investigate the structural and electrical properties of these Fe thin films as a function of the s...

Nanocrystalline Fe72Al28 alloy samples were prepared by the mechanical alloying process using planetary high-energy ball mill. The alloy formation and different physical properties were investigated as a function of milling time, t, (in the 0-24 h range) by means of the X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), energy d...

Wurtzite zinc oxides films (ZnO) were deposited on silicon (0 0 1) and corning glass substrates using the pulsed laser deposition technique. The laser fluence, target-substrate distance, substrate temperature of 300 degrees C were fixed while varying oxygen pressures from 2 to 500 Pa were used. It is observed that the structural properties of ZnO f...

Carbon nitride films were synthesized by a KrF excimer laser ablation of a graphite target in a controlled nitrogen atmosphere. The laser fluence was set at 10, 12 and 16 J/cm2. These thin films were deposited on silicon substrate kept at room temperature and placed parallel to the target surface at a distance of 3 cm. The pressure of nitrogen was...

We present a detailed study of the thermal evolution of H ion-induced vacancy related complexes and voids in bulk GaN implanted under ion-cut conditions. By using transmission electron microscopy, we found that the damage band in as-implanted GaN is decorated with a high density of nanobubbles of 1 – 2 nm in diameter. Variable energy Doppler broade...

Nanocrystalline Fe particles were successfully prepared by the mechanical milling process using a high-energy planetary ball mill. The physical properties of the samples were investigated as a function of the milling time, t (in the 0–54h range) by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) a...

Electrical and magnetic properties were studied for evaporated Fe thin films on glass and Si substrates. These properties were investigated by means of the four point probe and the magneto-optical Kerr effect techniques. Rutherford backscattering (RBS) and scanning electron microscopy (SEM) experiments show no interdiffusion at the interface Fe/Si...

We have used a fully controlled APCVD experimental set up to prepare solid thin film samples of SnO2:Sb in different ratios. We used non destructive techniques to characterize our samples. X-ray diffraction was used to study the influence of Sb concentration on the lattice parameters and phase orientations. We have found that sample of concentratio...

We have studied the effect of substrates [glass and Si(100)], of Ni thickness (t"N"i) and of the deposition rate [v"1=13nm/min and v"2=22nm/min] on the structural and electrical properties of evaporated Ni thin films. The Ni thickness, measured by the Rutherford backscattering (RBS) technique, ranges from 28 to 200nm. From X-ray diffraction, it was...

We report on the effect of thickness on the structural and optical properties of TiO2 thin films obtained by direct exposure of Ti metal film to thermal oxidation. Ti thin films with thicknesses ranging from 87 nm to 484 nm were deposited onto glass substrate by RF magnetron sputtering. Thereafter, the as-deposited Ti films were annealed in air at...

We report on the effect of thickness on the structural and electrical properties of permalloy thin films Ni$_{81}$Fe$_{19 }$ (Py). Permalloy films were deposited onto Si(100) substrates at room temperature using a KrF (wavelength of 248 nm, pulse duration of 30 ns) excimer laser at a fluence of 3 J/cm$^{2}$. The thickness ranges from 25 nm to 250 n...

Nanocrystalline Fe50Ni50 alloy samples were prepared by the mechanical alloying process using planetary high-energy ball mill. The alloy formation and different physical properties were investigated as a function of milling time, t, (in the 0–50 h range) by means of the X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), energy d...

Nanocrystalline Fe80Ni20 alloy samples were prepared by the mechanical alloying process using a high-energy planetary ball mill. The formation and physical properties of the alloys were investigated as a function of the milling time, t, (in the range 0-48 h) by means of X-ray diffraction, scanning electron microscopy (SEM), energy dispersive X-ray,...

Electroplating technique is especially interesting due to its low cost and high quality of deposits being extensively used in industry to deposit magnetic layers. In this work, NiFe films were electrodeposited on n-type Si(100) (1–7Ohmcm) substrates using constant current mode. In the aim to determine the suitable conditions for obtaining the perma...