scholarly journals Structural Features of Sm-=SUB=-1-x-=/SUB=-Eu-=SUB=-x-=/SUB=-S Thin Polycrystalline Films

2017 ◽  
Vol 51 (6) ◽  
pp. 860
Author(s):  
V.V. Kaminskii ◽  
S.M. Solov'ev ◽  
G.D. Khavrov ◽  
N.V. Sharenkova ◽  
Shinji Hirai
Keyword(s):  
Coherent Scattering ◽  
Structural Features ◽  
Lattice Parameter ◽  
Film Deposition ◽  
Polycrystalline Films ◽  
Variable Valence ◽  
X Ray ◽  
Thin Polycrystalline

Thin polycrystalline Sm1-xEuxS films (x=0.1, 0.167, 0.2, 0.25, 0.33, 0.5) were prepared by evaporation of SmS and EuS powders. Structural features of the films were investigated. The influence of Eu concentration and temperature of film deposition on the value of lattice parameter and sizes of x-ray coherent scattering regions was studied. It is shown that formation of Sm1-xEuxS films comes about according to the theory that was previously suggested for SmS films and that the deviation of lattice parameter is explained by the variable valence of samarium ions. DOI: 10.21883/FTP.2017.06.44569.8409

Structural features of Sm1–x Eu x S thin polycrystalline films

2017 ◽  
Vol 51 (6) ◽  
pp. 828-830 ◽  
Author(s):  
V. V. Kaminskii ◽  
S. M. Solov’ev ◽  
G. D. Khavrov ◽  
N. V. Sharenkova ◽  
Shinji Hirai
Keyword(s):  
Structural Features ◽  
Polycrystalline Films ◽  
Thin Polycrystalline

scholarly journals Epitaxial Growth and Optical Properties of Laser Deposited CdS Thin Films

Coatings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 87
Author(s):  
Atef S. Gadalla ◽  
Hamdan A. S. Al-shamiri ◽  
Saad Melhi Alshahrani ◽  
Huda F. Khalil ◽  
Mahmoud M. El Nahas ◽  
...  
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Photon Energy ◽  
Hexagonal Phase ◽  
High Vacuum ◽  
Structural Features ◽  
Film Deposition ◽  
X Ray ◽  
Cds Thin Films ◽  
Cds Films

In this study, cadmium Sulfide (CdS) thin films were synthesized on quartz substrates using an infrared pulsed laser deposition (IR-PLD) technique under high vacuum (~10−6 Torr) conditions. X-ray diffraction was used to evaluate the structural features. According to X-ray analysis, the deposited CdS films are crystalline and have a favored orientation on a plane (110) of an orthorhombic. The peak intensity and the average crystallite size increases with increasing the film thickness. After annealing at 300 °C, the orthorhombic phase transformed into a predominant hexagonal phase and the same result was obtained by SEM photographs as well. Spectrophotometric measurements of transmittance and reflectance of the CdS films were used to derive optical constants (n, k, and absorption coefficient α). The optical band gap energy was found to be 2.44 eV. The plasma plume formation and expansion during the film deposition have also been discussed. The photocurrent response as a function of the incident photon energy E (eV) at different bias voltages for different samples of thicknesses (85, 180, 220 and 340 nm) have been studied, indicating that the photocurrent increases by increasing both the film thickness and photon energy with a peak in the vicinity of the band edge. Thus, the prepared CdS films are promising for application in optoelectronic field.

scholarly journals Epitaxial Growth and Optical Properties of Laser Deposited CdS Thin Films

2021 ◽  
Author(s):  
Hamdan Ali Sultan Ali Sultan Al-shamiri ◽  
Atef S. Gadalla ◽  
Huda F. Khalil ◽  
Mahmoud M. El Nahas ◽  
Mohamed A. Khedr
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Photon Energy ◽  
Hexagonal Phase ◽  
High Vacuum ◽  
Structural Features ◽  
Film Deposition ◽  
X Ray ◽  
Cds Thin Films ◽  
Cds Films

Abstract Cadmium Sulfide (Cds) thin films were synthesized on quartz substrates using infrared pulsed laser deposition (IR-PLD) technique under high vacuum (~ 10− 6 Torr). X-ray diffraction was used to evaluate the structural features. According to X-ray analysis the deposited CdS films are crystalline and have a favored orientation on a plane (110) of an orthorhombic system and the peak intensity and the average crystallite size increases with increasing the film thickness. After annealing at 300oC the orthorhombic phase transformed into predominant hexagonal phase and the same result was obtained by SEM photographs. Spectrophotometric measurements of transmittance and reflectance of the Cds films were used to derive optical constants (n, k and absorption coefficient α). The optical band gap energy was found to be 2.44 eV. The plasma plume formation and expansion during the film deposition have been discussed. The photocurrent response as a function of the incident photon energy E (eV) at different bias voltages for different samples of thicknesses (85, 180, 220 and 340 nm) have been studied, indicating that the photocurrent increases by increasing both the film thickness and photon energy with a peak in the vicinity of the band edge. Thus, the prepared Cds films are promising for application in optoelectronic field.

scholarly journals The dependence between the structural-morphological features mixes 0.8SiO2/0.2Al2O3 from the time of mechanicall treatment

2021 ◽  
Vol 22 (3) ◽  
pp. 516-521
Author(s):  
Yu.V. Yavorsky' ◽  
Ya.V. Zaulichny ◽  
M.V. Karpets ◽  
A.I. Dudka ◽  
A.B. Hrubiak ◽  
...  
Keyword(s):  
Mechanical Treatment ◽  
Structural Parameters ◽  
Coherent Scattering ◽  
Lattice Parameter ◽  
Morphological Features ◽  
Sem Images ◽  
X Ray ◽  
Before And After ◽  
Perfect Mixing ◽  
The Relationship

This paper highlights the relationship between changes in structural and morphological features, electronic structure and exanging of time mechanical treatment at microbraker (MBT). Scaning electron microscopy revealed a change in the morphological features of nanoscale powders. From the comparison of SEM images of 0.8SiO2/0.2Al2О3 mixture before and after MBT, it is established that due to MBT, the agglomerates of the initial components are simultaneously crushed with perfect mixing particles of oxides between each other and the formation of new agglomerates with a denser structure. The increase in processing time leads to an increase in the density of the nanocomposite. The effect of time of mechanical treatment  on the structural parameters and phase composition of mixtures of silicon dioxide and titanium were studied using the method of X-ray structural analysis. The established agglomeration is accompanied by a change in the lattice parameter c with a change in the regions of coherent scattering of crystalline Al2О3. Ultra-soft X-ray emission spectroscopy was used to study the distribution of Op-, Sisd- and Alsd- valence electrons in 0.8SiO2/0.2Al2О3 powder mixtures after the different time of mechanicall treatment. An increase in atomic charges has been measured and can be explained by the transfer of electrons from Si and Al to O atoms in split Opπ-binding states.

Ni2Sn2Zn from single-crystal X-ray diffraction

2012 ◽  
Vol 68 (10) ◽  
pp. i65-i67 ◽  
Author(s):  
Clemens Schmetterer ◽  
Divakar Rajamohan ◽  
Herta Silvia Effenberger ◽  
Hans Flandorfer
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structural Features ◽  
Lattice Parameter ◽  
X Ray Diffraction ◽  
Quaternary Compound ◽  
Space Group ◽  
X Ray

Dinickel ditin zinc, Ni2Sn2Zn, crystallizes in the cubic space group Pm\overline{3}m, with a lattice parameter ofa= 8.845 (1) Å and with all atoms occupying special positions. The crystal structure exhibits pronounced similarities with that of the quaternary compound Ni5.20Sn8.7Zn4.16Cu1.04. It shares structural features with other compounds in the Ni–Sn–Zn system, such as Ni5Sn4Zn and Ni3Sn2.

Modelling of diffraction from fibre texture gradients in thin polycrystalline films

2007 ◽  
Vol 40 (4) ◽  
pp. 735-742 ◽  
Author(s):  
M. Birkholz
Keyword(s):  
Tilt Angle ◽  
Rotational Symmetry ◽  
Texture Gradient ◽  
Polycrystalline Films ◽  
X Ray Diffraction ◽  
Measured Intensity ◽  
X Ray ◽  
Fibre Texture ◽  
Intensity Mapping ◽  
Thin Polycrystalline

Crystallographic textures in thin polycrystalline films typically exhibit a rotational symmetry,i.e.they occur as a fibre texture with the texture pole being orientated in the direction of the substrate normal. As a further characteristic of thin-film textures, it was often observed that the degree of preferred orientation increases with increasing thickness. It is shown in this work how a fibre texture gradient may be modelled in kinematical X-ray diffraction and which effects it has on the intensity mapping of theIHKLreflection, when theHKLpole is the fibre axis. A general expression forIHKLis derived for a depth-dependent fibre texture that is based on the finite Laplace transform of the texture distribution. The concept is outlined for the cosnψ function to model the tilt-angle dependence of intensity, with the parameterndenoting the degree of texture. It is found that the measured intensity distribution sensitively depends on the ratio of texture gradient over X-ray attenuation coefficient. For particular cases, it is found that the maximum intensity may occur for non-zero tilt angles and thus arise at a different tilt angle from the pole of the fibre texture.

scholarly journals THE EFFECT OF ACTIVE SCREEN PLASMA NITRIDING TREATMENT ON STRUCTURAL, MECHANICAL AND MAGNETIC PROPERTIES OF NANOCRYSTALLINE FINEMET-TYPE ALLOY

2012 ◽  
Vol 05 ◽  
pp. 784-792 ◽  
Author(s):  
E. MEMARZADEH LOTFABAD ◽  
H. R. MADAAH HOSSEINI
Keyword(s):  
Volume Fraction ◽  
Plasma Nitriding ◽  
Structural Features ◽  
Lattice Parameter ◽  
Crystalline Volume Fraction ◽  
X Ray Diffraction ◽  
Type Alloy ◽  
X Ray ◽  
Active Screen Plasma Nitriding ◽  
Active Screen

The Active Screen Plasma Nitriding (ASPN) treatment of Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 alloy was investigated for 3 h at 480 °C and 560 °C in various N 2- H 2 gas mixtures at 5 mbar atmosphere. The amorphous ribbons were then annealed under vacuum at the same time and temperatures. The samples were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Microhardness measurements and Vibrating Sample Magnetometer (VSM). It was observed that the ASPN treatment leads to finer grain size and higher crystalline volume fraction and modifies the structural features of Fe ( Si ) phase. The Fe ( Si ) lattice parameter for the nitrided samples was higher than that for the annealed samples due to the diffusion of nitrogen into the Fe ( Si ) phase and the formation of Si - N precipitates. In ASPN treatment, the lowest magnitude of coercivity and the maximum saturated magnetization were obtained at 480 °C and 560 °C, respectively, in 75% H 2-25% N 2 gas mixture. ASPN treatment increased the microhardness of the samples.

scholarly journals Obtaining and X-ray Analysis of Cobalt Ferrite Powders Substituted by Nickel Cations

2015 ◽  
Vol 16 (2) ◽  
pp. 351-354
Author(s):  
V.S. Bushkova ◽  
I.P. Yaremiy ◽  
R.V. Ilnitsky ◽  
R.P. Lisovskiy ◽  
M.L. Mokhnatskyi
Keyword(s):  
Cobalt Ferrite ◽  
Sol Gel ◽  
Nickel Content ◽  
Coherent Scattering ◽  
Lattice Parameter ◽  
X Ray ◽  
Nickel Cobalt ◽  
Auto Combustion ◽  
Ray Density ◽  
Average Size

The aim of this work was to create and study of ferrite nickel-cobalt powders, using sol-gel technology with participation of auto-combustion. After completing the process autocombustion was obtained only one phase, which corresponded to  the cubic structure of spinel space group Fd3m. It was found that the average size of coherent scattering regions not exceeding 62 nm. The dependences of the lattice parameter, X-ray density and specific surface area of the ferrite powders from nickel content were found. It was shown that at substitution of cations cobalt on cations nickel latest give preference only B positions, thus displacing part of in the A positions.

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