Structural correlations in light irradiated Ge36Se64 amorphous films—Radial distribution function study

Sedeek, K.; Adam, Abdullahi Abbas; Balboul, M.R.; Wahab, L.A.; Makram, N.

doi:10.1016/j.materresbull.2007.06.056

Cited by 17 publications

(4 citation statements)

References 23 publications

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“…GeSe glasses are important chalcogenide semiconductors, with numerous promising applications [7][8][9]. Research on GeSe glass has been carried out for decades, to determine rigidity percolation, glass transition and the short and intermediate range order of the structure [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Dependence of optical properties on the thickness of amorphous Ge₃₀Se₇₀ thin films

Solieman

Hafiz

Abu-Sehly

et al. 2014

Journal of Taibah University for Science

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In order to calculate the optical properties of evaporated Ge 30 Se 70 thin films and their relation to thickness, amorphous Ge 30 Se 70 thin films of different thicknesses were deposited by thermal evaporation at a base pressure of 7.5 × 10 −6 Torr at room temperature. The optical transmission and reflection spectra of all films were measured in the wavelength range of 0.2-2.5 m. Efficient parameterization of the spectral dependence of the optical constants of amorphous Ge-Se thin films was obtained by applying a suitable dielectric function model. The O'Leary, Johnson and Lim (OJL) model, based on joint density of states functions, was used to analyze the optical spectra. The best fit was obtained by configuring the film as two layers, the top layer consisting of bulk Ge 30 Se 70 material embedded in air medium containing different volumes of voids. Therefore, the OJL model coupled with the Bruggeman effective-medium approximation model were used to determine the optical constants of the Ge 30 Se 70 thin films. The photon energy dependence of the dielectric function, ε = ε r − iε i of the investigated films is presented. The film thickness, absorption coefficient α, refractive index n, extinction coefficient k, static refractive index n(0) and optical band gap Eg were deduced. We found that increasing the film thickness increased the direct optical energy gap and decreased the refractive index.

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Section: Introductionmentioning

confidence: 99%

Dependence of optical properties on the thickness of amorphous Ge₃₀Se₇₀ thin films

Solieman

Hafiz

Abu-Sehly

et al. 2014

Journal of Taibah University for Science

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“…In recent years much attention has been paid to Ge-Se amorphous chalcogenide semiconductors as they are very promising materials for optoelectronic applications [1][2][3][4][5][6]. Thakur investigated the optical band gap of thermal evaporated amorphous Ge 20 Se 80 film [1].…”

Section: Introductionmentioning

confidence: 99%

“…Plots of the refractive-index factor (n 2 − 1) −1 vs. photo energy squared (h )2 for as-deposited and annealed GeSe2 and GeSe4 films.…”

mentioning

confidence: 99%

Annealing effects on the structure and optical properties of GeSe2 and GeSe4 films prepared by PLD

Pan¹,

Tao²,

Zang³

et al. 2009

Journal of Alloys and Compounds

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“…In order to ensure a successful preparation for MGs, i.e. full amorphous transformation, the radial distribution functions [14] (RDF) of melting and quenching process was plot as shown in the glass transition temperature (T g ) was determined through the linear fitting [15] . Fig.…”

Section: Interatomic Potentialsmentioning

confidence: 99%

Effect of Machining Parameters on the Cutting Force and Microstructure in Nanometric Cutting of Cu50Zr50 Metallic Glass

Zhao¹,

Li²,

Yan³

et al. 2016

CNANO

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Unlike the traditional crystalline metals, metallic glasses are lack of long-range order and have short-range order. Metallic glasses as amorphous alloys have excellent physical, chemical and mechanical properties, and have a broad application prospects in military, aerospace and sports equipment due to their unique microstructure. Cutting is an important shaping process for high efficient manufacturing of metallic glass components. Nanometric cutting simulation of Cu 50 Zr 50 was carried out to investigate the effect of cutting speed and cutting depth on the cutting force by molecular dynamics simulation. The radial distribution functions and common neighbor analysis were calculated to analyze the microstructure of the chips and subsurface of the metallic glass workpiece. The results showed that there is no obvious change of microstructure during cutting process of Cu 50 Zr 50 metallic glasses. The above simulation results were compared with those of nanometric cutting of single crystal copper with the same cutting parameters. It is found that, when nanometric cutting of Cu 50 Zr 50 metallic glass, the average value and the fluctuation of cutting forces are larger than that of single crystal coppers. In addition, the normal cutting force was found to be substantially equal to the main cutting force during the cutting process of Cu 50 Zr 50 metallic glasses. However, the normal force is smaller than the main cutting force during nanometric cutting process of the single crystal copper.

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Structural correlations in light irradiated Ge36Se64 amorphous films—Radial distribution function study

Cited by 17 publications

References 23 publications

Dependence of optical properties on the thickness of amorphous Ge₃₀Se₇₀ thin films

Dependence of optical properties on the thickness of amorphous Ge₃₀Se₇₀ thin films

Annealing effects on the structure and optical properties of GeSe2 and GeSe4 films prepared by PLD

Effect of Machining Parameters on the Cutting Force and Microstructure in Nanometric Cutting of Cu50Zr50 Metallic Glass

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Structural correlations in light irradiated Ge36Se64 amorphous films—Radial distribution function study

Cited by 17 publications

References 23 publications

Dependence of optical properties on the thickness of amorphous Ge30Se70 thin films

Dependence of optical properties on the thickness of amorphous Ge30Se70 thin films

Annealing effects on the structure and optical properties of GeSe2 and GeSe4 films prepared by PLD

Effect of Machining Parameters on the Cutting Force and Microstructure in Nanometric Cutting of Cu50Zr50 Metallic Glass

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Dependence of optical properties on the thickness of amorphous Ge₃₀Se₇₀ thin films

Dependence of optical properties on the thickness of amorphous Ge₃₀Se₇₀ thin films