Reza Sarhaddi

University of Birjand · Department of Physics

In this work, giant magnetoimpedance (GMI); magnetic hysteresis loop; and sensitivity of Co68.5Fe4Si16.5B11 (S), Co67.7Fe4W0.8Si16.5B11 (W1), and Co66.5Fe4W2Si16.5B11 (W2) are comparatively studied for evaluating the effect of tungsten (W) on cobalt-based ribbons. At the frequency of 4.5 MHz and current of 25 mA, the values of GMI and sensitivity o...

In this paper, we demonstrate a combined theoretical and experimental study on the electronic structure, and the optical and electrochemical properties of β-Ag2MoO4 and Ag2O. These crystals were synthesized using the hydrothermal method and were characterized using X-ray diffraction (XRD), Rietveld refinement, and TEM techniques. XRD and Rietveld r...

First-principle calculations based on the density functional theory (DFT) method are used to investigate the influence of strong electric field on the 7Be half-life. For this purpose, electronic structures of Be and BeO are examined in the presence of a homogeneous electric field. The electron density at the nucleus is estimated upon the geometry o...

First-principle calculations within the density functional theory framework are used to study the probability of electron capture for the 7Be nucleus. For this purpose, electron density at the 7Be nucleus is computed in Al,Au, Pd, Pt, and Pb environments. Our results show that the half-life of 7Be is changed by implanting 7Be in host environments....

The crystalline structure and magnetic properties of chromium substituted hexagonal strontium ferrite, SrFe12−xCrxO19 (x = 0, 0.25, 0.5, 0.75, 1), nanoparticles have been investigated by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and vibrating sample magnetometer (VSM)....

In this research, the ferrofluid based on the cobalt ferrite nanoparticles, CoFe2O4 was prepared by the co-precipitation methodology at different reaction times (0.5, 2, 3.5, 5, and 6.5 hours). The effect of reaction time parameter on the crystal structure, morphology and magnetic properties of the cobalt ferrite nanoparticles in the ferrofluids ba...

In this research, the influence of circular configuration of cobalt-based amorphous wire on magnetoimpedance is investigated. The results show that magnetoimpedance of circle wire depends on the angle between magnetic field and circle wire. The Magnetoimpedance for circle wire decriese by changing the angle of 0 to 90o. However, in this configurati...

In this research, SrFe12−xNixO19 (x = 0 − 1) hexagonal ferrites were prepared by sol-gel auto-combustion method. Effect of Ni substitution on structural, morphological and magnetic properties of nanoparticles was investigated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Transmission electron microscopy (TEM) and vibrating sample...

In this work, the sol-gel auto-combustion method has been successfully used to prepare nanocrystalline strontium hexaferrite doped with cobalt at iron sites (SrFe12−x CoxO19, x = 0–1). The crystal structure, morphology, and magnetic properties of samples were systematically investigated using Fourier transform infrared spectroscopy (FT-IR), X-ray d...

In this work, the impedance properties of Co68.15Fe4.35Si12.5B15 cobalt-based amorphous wires connected in a crossed configuration have been studied. For this purpose, at first, the magnetic properties of a single wire and also two wires perpendicular to each other were investigated. The obtained results for a single wire present a decrease and inc...

Background: Giant Magneto Impedance (GMI) is effectively enhanced by the mutual magnetic interaction between two wires arranged in parallel setup. The direction of current flowing through two wires (series or parallel current mode) has a key role in this change. Methods: The aim of this research is to study the GMI properties of series and parallel...

In this research, magnetic anisotropy of Co68.15Fe4.33B12.5Si15 microwires were investigated. For this purpose, VVSM (Vector Vibrating Sample Magnetometer) analysis, which measures the transverse components of the magnetization simultaneously with the longitudinal one, was used. The magnetic field is applied in different directions with respect to...

In this paper, strontium hexaferrite nanoparticles were synthesized by the sol–gel auto-combustion method. Effect of annealing temperature on crystal structure, morphology and magnetic properties of nanoparticles was investigated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), transmission electron microscopy (TEM) and vibrating sam...

In this paper, SnO2 thin film and nanopowder were prepared by spray pyrolysis and sol-gel methods, respectively. The SnO2 nanostructures were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Then Aspergillus niger fungus were cultured in an appropriate medium and were exposed t...

The research activities conducted in this thesis are based on three sections. In first section, the design and fabrication details of the Sieverts apparatus are presented. This apparatus can measure hydrogen absorption-desorption properties in the metal hydride alloys consisted of kinetic and pressure-composition-temperature (PCT) curves in differe...

The structural, stability and electronic properties of C15-AB2 (A = Ti, Zr; B = Cr) isomeric intermetallic compounds were systematically investigated by using density functional theory (DFT) and plane-wave pseudo-potential (PW-PP) method. The macroscopic properties including the lattice constant, bulk modulus and stability for these compounds were...

A comprehensive study of structural, morphological, magnetic and hydrogen absorption properties of LaNi5–H system was investigated. The X-ray diffraction patterns show that as-synthesized LaNi5 alloy is single phase with CaCu5-type structure while some weak peaks of elemental nickel also appeared after several hydrogenation/dehydrogenation (H/D) cy...

The present study deals with the experimental and theoretical approaches of LaNi 5 hydrogen storage alloy. The structural, morphological and hydrogena-tion characterization of this sample which is synthesized by the arc melting technique were carried out by X-ray diffraction, scanning electron microscopy and a homemade Sievert's type apparatus, res...

In this study, Co0.5Ni0.5-xMnxFe2O4 (x=0, 0.15, 0.25, 0.35, 0.5) ferrite nanoparticles were prepared by sol-gel auto-combustion method. Structural, magnetic and morphology properties of obtained nanoparticles were investigated with X-ray Diffraction (XRD), Vibrating Sample Magnetometer (VSM) and Transmission Electron Microscopy(TEM), respectively....

The electronic structures of Co-based Heusler compounds CoTiAl1−xSix (x=0, 0.25, 0.5, 0.75 and 1) are calculated by first-principles using the full potential linearized augmented plane wave (FP-LAPW) method within GGA and LSDA+U scheme. Particular emphasis was put on the role of the main group elements. In recent years, the GGA calculations of Co2T...

In this paper, we report structural and optical properties of nanocrystalline chromium (Cr) doped ZnS particle, which have been synthesized by co-precipitation method. The structural properties of ZnS:Cr nanoparticles have been characterized by X-ray diffraction (XRD) analysis. The XRD patterns show hexagonal structure in nanoparticles without any...

In this work, the structural, energetic and electronic properties of Mg2FeH6 complex hydride have been studied using two different methods based on the density functional theory (DFT): the full potential linearized augmented plane wave plus local orbitals (FP-LAPW + lo) and the pseudo-potentials plane waves (PP-PW) methods. Based on the calculated...

Neodymium doped titanium oxide thin films with mole ratio Nd/Ti = 0, 6, 10, 15, 20, 25% were deposited on glass substrate by spray pyrolysis technique. The structural properties, surface morphology and absorption spectra of thin films have been obtained using X-ray diffraction (XRD), scanning electron microscope (SEM) and UV-Vis spectrophotometer,...

In this paper, we report structural and optical properties of nanocrystalline chromium (Cr) doped ZnS particle, which have been synthesized by co-precipitation method. The structural properties of ZnS:Cr nanoparticles have been characterized by X-ray diffraction (XRD) analysis. The XRD patterns show hexagonal structure in nanoparticles without any...

In this paper, we report on the structural, microstructural and optical properties of nano-crystalline indium tin oxide (ITO) particle, which has been synthesized by sol–gel process using a simple starting hydro-alcoholic solution consisting of In(NO3)3.5H2O, SnCl4.5H2O, citric acid as complexing and ethylene glycol as polymerization agents. The st...

Alumina–titania ceramic membrane with mesopore and narrow pore size distribution was prepared by the sol–gel process. Observations were based on membrane weight loss, morphology, pore size distribution and BET surface area. Thermogravimetric analysis (TGA), Scanning Electron Microscopy (SEM) and N2 adsorption-desorption analysis were employed for t...