High Pressure Effects on the Structural Properties of GaN Compound Using Equations of State

AL-FARİS, Siham J.; Al-Saqa, Raed H.; MOHMAD, Huda M.; KAREEM, Sırwan

doi:10.5541/ijot.960849

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…They calculated the bulk modulus, compression ratio, lattice constant, and phonon frequency spectrum of GaN under high pressure to 40 GPa using three B-M and modified Lennard-Jones EOSs. The agreements of their results for the phonon frequency spectrum that were obtained using B-M EOS with experimental data were better than those obtained from modified Lennard-Jones EOS [28].…”

Section: Introductionmentioning

confidence: 83%

“…They attributed that to the higher bulk modulus of the smaller silicon nanoparticle [27]. AL-Faris et al [28] made theoretical calculations to study the thermodynamic properties of gallium nitride (GaN) under high pressure. They calculated the bulk modulus, compression ratio, lattice constant, and phonon frequency spectrum of GaN under high pressure to 40 GPa using three B-M and modified Lennard-Jones EOSs.…”

Section: Introductionmentioning

confidence: 99%

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Variation of Bulk Modulus, Its First Pressure Derivative, and Thermal Expansion Coefficient with Applied High Hydrostatic Pressure

Mahammed,

Mohammed

2023

Advances in Condensed Matter Physics

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Throughout this work, the equations of variation of the isothermal bulk modulus, its first pressure derivative, and the volumetric thermal expansion coefficient as a function of pressure were derived based on the Birch–Murnaghan equation of state (B–M EOS). The bulk modulus and its first derivative at ambient temperature for nine elements were extracted by fitting the published experimental pressure–volume data to B–M EOS, and the results were compared with other published researches, and there was a good agreement. Moreover, those extracted values were used to study the variation of the isothermal bulk modulus, its first pressure derivative, and the isothermal coefficient of thermal expansion as a function of the applied hydrostatic pressure using the equations that were derived from this work.

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Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Variation of Bulk Modulus, Its First Pressure Derivative, and Thermal Expansion Coefficient with Applied High Hydrostatic Pressure

Mahammed,

Mohammed

2023

Advances in Condensed Matter Physics

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“…High pressure transforms the phonon energy into higher energy levels, as well as reduces the number of modes that acquire those high energy levels [16]. Consequently, the pressure dependence of both phonon frequency spectrum and density of the states are described by [12,17]:…”

Section: Phonon Lattice Vibrationmentioning

confidence: 99%

High-Pressure Calibration TiN Equation of State

KAREEM,

UONİS,

ALSAQA

2023

International Journal of Thermodynamics

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High pressure is becoming an interesting area of research for originating vital properties in crystalline solids. In the present study, the pressure equation of the state of TiN was investigated by employing various equations of state (EoS) presented in the literature, such as Dodson EoS, Barden EOS, Birch-Murnaghan (B-M) EoS. The EoSs were processed to find the high-pressure effects on the characterizations of TiN such as volume compression ratio, bulk modulus B, Grüneisen parameter, and phonon frequency spectrum. It was shown that a gigantic pressure results in a significant reduction in the volume of the TiN material, and the volume compression ratio reduction, is almost the same for the existing equations of state and the comparative literature results up to a pressure of 80 GPa. The maximum pressure difference is observed to be 4.85 GPa. over the entire pressure of 120GPa. Increasing the bulk modulus with high pressure was expected by the present EoSs, and up to the pressure of about 60 GPa, all curves of bulk modulus are matched with each other. Eventually, a fair comparison has been made between the present results and the first principle approximation along with the generalized gradient approximation method in which a perfect agreement was observed. Finally, the feasibility of TiN EoS as a standard pressure calibration was demonstrated.

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“…First Grüneisen parameter  belongs to the most important physical characteristics of crystal lattice dynamics [34]. Where  is assumed to be volume dependent [35,36]. Sβ under high pressure using data of VP/V0 which is given from three equations ( 1), ( 2) and (3) at different value of pressure, and substituting it in eq.…”

Section: First Grüneisen Parametermentioning

confidence: 99%

Study of Thermodynamic Properties of Monoclinic Sulfur (Sβ) Under High Pressure Using Three Different Equations of State for the Treatment Scabies in Dermatology

ALİ¹,

Al-Saqa²,

Sultan³

2022

International Journal of Thermodynamics

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Thermodynamic properties of monoclinic β-sulfur Sβ under high pressure up to 20 Gpa have been studied, where Orthorhombic α-sulfur Sα changes to Sβ at 94.4℃. The high pressure technology used to tackle the crystallization volume of sulfur Sβ without changes in the chemical properties. Sulfur Sβ can be used after the effect of high pressure in the development of the medicine used to treat scabies. The present study is performed to calculate the effects of high pressure on some important physical properties of the material such as (bulk modulus (B), compression volume ratio (VP/Vo), Grüneisen parameter ), Debye temperature (θD) and phonon frequency spectrum (pfs). Three different equations of state EOS's (Birch-Murnaghan EOS, Vinet EOS and modified Lennard-Jones EOS) were implemented to analyze pressure-volume relationship and then combining calculated data with various expressions of volume dependence of the other thermodynamic properties that are; Bulk modulus, Grüneisen parameter, Debye temperature and phonon frequency spectrum. The behavior of any of these concepts were described in different figures. It was found that, relative volume, and Grüneisen parameter were decreased with high pressure, while the other considered parameters; Bulk modulus, Debye temperature and phonon frequency spectrum were expected to increase as a high pressure is applied.

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High Pressure Effects on the Structural Properties of GaN Compound Using Equations of State

Cited by 9 publications

References 16 publications

Variation of Bulk Modulus, Its First Pressure Derivative, and Thermal Expansion Coefficient with Applied High Hydrostatic Pressure

Variation of Bulk Modulus, Its First Pressure Derivative, and Thermal Expansion Coefficient with Applied High Hydrostatic Pressure

High-Pressure Calibration TiN Equation of State

Study of Thermodynamic Properties of Monoclinic Sulfur (Sβ) Under High Pressure Using Three Different Equations of State for the Treatment Scabies in Dermatology

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