Microhardness, phase transition, acoustic wave velocities and melting temperature of AlxGa1−xSb

The band structure of Al[Formula: see text]Ga[Formula: see text]Sb semiconducting ternary alloys and their related properties such as elastic constants, microhardness, transition pressure to the first phase, acoustic wave velocities and melting temperature have been investigated. The calculations are performed using a pseudopotential approach within the virtual crystal approximation which includes the effect of compositional disorder as an effective potential. Generally, our results are found to be in good accord with the experimental results. The composition dependence of all features of interest showed a monotonic behavior and suggests that the stiffness, hardness and structural stability becomes better in Al[Formula: see text]Ga[Formula: see text]Sb for higher Al concentrations. The bulk sound speeds and melting temperature are found to become larger when increasing the Al content.

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ELASTIC CONSTANTS AND ACOUSTIC WAVE VELOCITIES IN Cd1-xZnxTe MIXED CRYSTALS

Modern Physics Letters B ◽

10.1142/s0217984908015371 ◽

2008 ◽

Vol 22 (12) ◽

pp. 1221-1229 ◽

Cited By ~ 7

Author(s):

N. BOUARISSA ◽

Y. ATIK

Keyword(s):

Acoustic Wave ◽

Elastic Constants ◽

Mixed Crystals ◽

Bulk Acoustic Wave ◽

Virtual Crystal Approximation ◽

Wave Speeds ◽

Wave Velocities ◽

Zinc Blende ◽

Compositional Disorder ◽

Zinc Blende Structure

Based on the pseudopotential scheme under the virtual crystal approximation that takes into account the effect of compositional disorder combined with the bond-orbital model of Harrison, the results of calculations of elastic constants and surface and bulk acoustic wave speeds of Cd 1-x Zn x Te mixed crystals in the zinc-blende structure are presented. The agreement between our results and known data, which are only available for CdTe and ZnTe is found to be reasonable.

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Energy gaps, valence and conduction charge densities and optical properties of GaAs1−xPx

International Journal of Modern Physics B ◽

10.1142/s0217979218501254 ◽

2018 ◽

Vol 32 (10) ◽

pp. 1850125 ◽

Cited By ~ 1

Author(s):

O. A. Al-Hagan ◽

H. Algarni ◽

N. Bouarissa ◽

T. F. Alhuwaymel ◽

M. Ajmal Khan

Keyword(s):

Optical Properties ◽

Visible Spectrum ◽

Ternary Alloys ◽

Light Emitters ◽

Virtual Crystal Approximation ◽

Charge Densities ◽

Zinc Blende ◽

Good Accord ◽

Phosphorous Content ◽

Pseudopotential Approach

The electronic structure and its derived valence and conduction charge distributions along with the optical properties of zinc-blende GaAs[Formula: see text]P[Formula: see text] ternary alloys have been studied. The calculations are performed using a pseudopotential approach under the virtual crystal approximation (VCA) which takes into account the compositional disorder effect. Our findings are found to be generally in good accord with experiment. The composition dependence of direct and indirect bandgaps showed a clear bandgap bowing. The nature of the gap is found to depend on phosphorous content. The bonding and ionicity of the material of interest have been examined in terms of the anti-symmetric gap and charge densities. The variation in the optical constants versus phosphorous concentration has been discussed. The present investigation may give a useful applications in infrared and visible spectrum light emitters.

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Calculation of Electronic and Optical Properties of Zinc-Blende MGX ZN1-X S

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.324.249 ◽

2011 ◽

Vol 324 ◽

pp. 249-252 ◽

Cited By ~ 1

Author(s):

Nadjla Mostefai ◽

Nadir Bouarissa ◽

Abdelhak Belkhir

Keyword(s):

Optical Properties ◽

Composition Dependence ◽

Ternary Alloys ◽

Virtual Crystal Approximation ◽

Electronic And Optical Properties ◽

Zinc Blende ◽

Blue Wavelength ◽

Indirect Band Gap ◽

Zinc Blende Structure ◽

Good Agreement

The electronic and optical properties of the MgxZn1-xS semiconductor ternary alloys crystallizing in the Zinc Blende structure are calculated using the empirical pseudopotential method (EPM) coupled with the virtual crystal approximation (VCA). The composition dependence of the direct and indirect band gap energies as well as the antisymmetric gap are investigated in the composition range 0 up to 1. Other quantities such as refractive index and coefficient of reflection are also obtained by means of different existing models. Our results are generally in good agreement with those available in the literature. The obtained informations could be useful for the feature design of blue wavelength optoelectronic devices.

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Composition dependence of the glass-forming ability and soft magnetic properties of Fe-rich Fe–Nb–B ternary alloys

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.3139/146.111853 ◽

2019 ◽

Vol 110 (12) ◽

pp. 1116-1122

Author(s):

Man Zhu ◽

Peng Tao ◽

Lijuan Yao ◽

Zengyun Jian ◽

Fang'e Chang

Keyword(s):

Magnetic Properties ◽

Composition Dependence ◽

Glass Forming Ability ◽

Ternary Alloys ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Glass Forming

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Local and noncontact measurements of bulk acoustic wave velocities in thin isotropic plates and shells using zero group velocity Lamb modes

Journal of Applied Physics ◽

10.1063/1.2434824 ◽

2007 ◽

Vol 101 (3) ◽

pp. 034908 ◽

Cited By ~ 65

Author(s):

Dominique Clorennec ◽

Claire Prada ◽

Daniel Royer

Keyword(s):

Acoustic Wave ◽

Group Velocity ◽

Bulk Acoustic Wave ◽

Wave Velocities ◽

Isotropic Plates ◽

Plates And Shells ◽

Noncontact Measurements ◽

Zero Group

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Contactless ultrasonic device to measure surface acoustic wave velocities versus temperature

Review of Scientific Instruments ◽

10.1063/1.2437768 ◽

2007 ◽

Vol 78 (2) ◽

pp. 024901 ◽

Cited By ~ 9

Author(s):

C. Hubert ◽

M.-H. Nadal ◽

G. Ravel-Chapuis ◽

R. Oltra

Keyword(s):

Acoustic Wave ◽

Surface Acoustic Wave ◽

Ultrasonic Device ◽

Wave Velocities

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Evaluation of Elastic Constants in Piezoelectric Ceramics by Measuring Acoustic Wave Velocities

Ferroelectrics ◽

10.1080/00150193.2015.1059161 ◽

2015 ◽

Vol 484 (1) ◽

pp. 14-24 ◽

Cited By ~ 1

Author(s):

Toshio Ogawa ◽

Taiki Ikegaya

Keyword(s):

Acoustic Wave ◽

Elastic Constants ◽

Piezoelectric Ceramics ◽

Wave Velocities

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Theoretical investigation of acoustic wave velocity of aluminum phosphide under pressure

International Journal of Physical Research ◽

10.14419/ijpr.v7i1.23681 ◽

2019 ◽

Vol 7 (1) ◽

pp. 3

Author(s):

Salah Daoud ◽

Abdelhakim Latreche ◽

Pawan Kumar Saini

Keyword(s):

Acoustic Wave ◽

Wave Velocity ◽

Elastic Constants ◽

Structural Parameters ◽

Theoretical Data ◽

Aluminum Phosphide ◽

Semiconducting Material ◽

Wave Velocities ◽

Knoop Microhardness ◽

Good Agreement

The bulk and surface acoustic wave velocities of Aluminum phosphide (AlP) semiconducting material under pressure up to 9.5 GPa were studied. The structural parameters and the elastic constants used in this work are taken from our previous paper published in J. Optoelec-tron. Adv. M. 16, 207 (2014). The results obtained at zero-pressure are analyzed and compared with other data of the literature. In addition, the acoustic Grüneisen parameter and the Vickers and Knoop microhardness are predicted and analyzed in detail. Our calculated results are in good agreement with the experimental and other theoretical data of literature.

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