The effect of different laser irradiation on rugometric and microtopographic features in zirconia ceramics: Study of surface statistical metrics

Solaymani, Shahram; Kulesza, Sławomir; Ţălu, Ștefan; Bramowicz, Mirosław; Nezafat, Negin Beryani; Dalouji, Vali; Rezaee, Sahar; Karami, Hossein; Malekzadeh, Mohammad; Dorbidi, Elham Soltanpanah

doi:10.1016/j.jallcom.2018.06.213

Cited by 30 publications

(20 citation statements)

References 39 publications

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“…In this group of Heusler compounds, Manganese is the main element, because one can say that the most known ferromagnetic Heuslers, except CrO 2 , are Mnbased compounds. Recent studies on Co 2 MnX (X = Si, Ge, Sn) and their films by Raphael et al [5,6,[16][17][18] predicted that the thin films of these compounds are not half-metallic 1 3 ferromagnetic, or that their full spin polarization is limited by antisite defects [19][20][21][22][23][24][25]. Hence, in this work, the halfmetallic behavior of Co 2 MnGa thin films is discussed, and the results of the study of the electrical and optical properties and thermodynamic stability of the 4 different terminations from Co 2 MnGa (001) surface are presented as well as a comparison with its bulk state.…”

Section: Introductionmentioning

confidence: 99%

The surface effect on the thermodynamic stability, half-metallic and optical properties of Co2MnGa(001) films: a DFT study

et al. 2019

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In this study, the half-metallic properties, thermodynamic stability and optical parameters of the full-Heusler Co 2 MnGa compound and its four different terminations of Co-Co, Co-Mn, Mn-Ga and Co-Ga from the surface of Co 2 MnGa (001) have been calculated based on the density functional theory (DFT). The results confirm the ferromagnetic half-metallic behavior with a magnetic moment of 4.08 B and a gap of 0.32 eV at the Fermi level of Co 2 MnGa bulk phase having a Cu 2 MnAl-type structure. The density of states curves showed that all possible terminations from the Co 2 MnGa (001) surface eliminate the half-metallic behavior except the termination of Mn-Ga case. Moreover, the results indicate that the termination of Mn-Ga with the lowest surface energy is the most stable termination for the application in spintronics. The optical coefficients such as real and imaginary dielectric function, refraction, extinction, energy loss function, optical conductivity and reflections of the bulk and Mn-Ga termination have been calculated and compared.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Introductionmentioning

confidence: 99%

The surface effect on the thermodynamic stability, half-metallic and optical properties of Co2MnGa(001) films: a DFT study

et al. 2019

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“…Multiscale spatial characteristics of surface morphology of the samples were obtained from SEM images making use of the allometric scaling dependence of the height data on the wavelength. SEM images with gray-scale pixels were processed using numerical routine that begins with calculation of the autocorrelation function according to the formula [25]:…”

Section: Methods Of Structural Characterizationmentioning

confidence: 99%

Surface Micromorphology and Crystalline Structures of Hard Dental Tissue Treated by Atmospheric Pressure Plasma Jet

Nezafat¹,

Kulesza²,

Ghoranneviss³

et al. 2019

Preprint

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In this paper, the results of helium plasma jet treatment of hard tissues of natural human teeth including enamel, dentin, and cementum are presented. Changes in surface morphology and structural properties have been investigated using scanning electron microscopy (SEM) in connection with multiscale image analysis, X-ray diffraction (XRD) with the aid of the Rietveld method and Williamson-Hall plots, energy dispersive X-ray (EDX) and Raman spectra analysis. Despite initial differences in scaling behaviors of the surfaces of freshly extracted tissues, spatial characteristics of their plasma-treated counterparts appeared similar taking into account the fractal measures. On the other hand, despite improvement in crystalline structure of enamel due to the plasma treatments, the structure of cementum has been found intact.

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“…In the last decades, AFM was applied as a modern tool for characterizing surface geometry (Mahmoodi, Solaymani, Amini, Nezafat, & Ghoranneviss, ; Sobola, Ţălu, Solaymani, & Grmela, ; Solaymani et al, ; Ţălu, ; Zolotarevskii, Novikov, Gusev, & Lyaskovskii, ). Furthermore, stereometric and fractal/multifractal analyses are suitable tools to characterize the nanoscale patterns in 3D complex surfaces of thin films because of their wide range of applications.…”

Section: Introductionmentioning

confidence: 99%

Micromorphology analysis of TiO₂ thin films by atomic force microscopy images: The influence of postannealing

Ţălu

Achour

Solaymani

et al. 2020

Microscopy Res & Technique

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This work describes an analysis of titanium dioxide (TiO 2 ) thin films prepared on silicon substrates by direct current (DC) planar magnetron sputtering system in O 2 /Ar atmosphere in correlation with three-dimensional (3D) surface characterization using atomic force microscopy (AFM). The samples were grown at temperatures 200, 300, and 400 C on silicon substrate using the same deposition time (30 min) and were distributed into four groups: Group I (as-deposited samples), Group II (samples annealed at 200 C), Group III (samples annealed at 300 C), and Group IV (samples annealed at 400 C). AFM images with a size of 0.95 μm × 0.95 μm were recorded with a scanning resolution of 256 × 256 pixels. Stereometric analysis was carried out on the basis of AFM data, and the surface topography was described according to ISO 25178-2:2012 and American Society of Mechanical Engineers (ASME) B46.1-2009 standards. The maximum and minimum root mean square roughnesses were observed in surfaces of Group II (Sq = 7.96 ± 0.1 nm) and Group IV (Sq = 3.87 ± 0.1 nm), respectively. K E Y W O R D S atomic force microscopy, fractal analysis, stereometric analysis, TiO 2 thin films

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The effect of different laser irradiation on rugometric and microtopographic features in zirconia ceramics: Study of surface statistical metrics

Cited by 30 publications

References 39 publications

The surface effect on the thermodynamic stability, half-metallic and optical properties of Co2MnGa(001) films: a DFT study

The surface effect on the thermodynamic stability, half-metallic and optical properties of Co2MnGa(001) films: a DFT study

Surface Micromorphology and Crystalline Structures of Hard Dental Tissue Treated by Atmospheric Pressure Plasma Jet

Micromorphology analysis of TiO₂ thin films by atomic force microscopy images: The influence of postannealing

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The effect of different laser irradiation on rugometric and microtopographic features in zirconia ceramics: Study of surface statistical metrics

Cited by 30 publications

References 39 publications

The surface effect on the thermodynamic stability, half-metallic and optical properties of Co2MnGa(001) films: a DFT study

The surface effect on the thermodynamic stability, half-metallic and optical properties of Co2MnGa(001) films: a DFT study

Surface Micromorphology and Crystalline Structures of Hard Dental Tissue Treated by Atmospheric Pressure Plasma Jet

Micromorphology analysis of TiO2 thin films by atomic force microscopy images: The influence of postannealing

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Micromorphology analysis of TiO₂ thin films by atomic force microscopy images: The influence of postannealing