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First principles calculations on thermodynamic properties of 𝛂−𝐀𝐥𝟐𝐎𝟑 under pressure and temperature

S. J. MOUSAVI1,*

Affiliation

  1. Department of Physics, Rasht Branch, Islamic Azad University, Rasht, Iran

Abstract

By employing the first principles method of the full potential linearized augmented plane waves (FP-LAPW) approach based on density functional theory and Debye model the thermodynamic properties of 𝛼−𝐴𝑙2𝑂3 are investigated. The exchange correlation potential was calculated in framework of generalized gradient approximation (GGA). Through the quasi-harmonic Debye model, in which the phononic effects are considered, we have obtained successfully the thermodynamic parameters including the relative volume, heat capacity and volume expansion coefficient over a pressure range 0-70 Gpa and a wide temperature range of 0-2000 K..

Keywords

Thermodynamic properties, Debye model, DFT.

Citation

S. J. MOUSAVI, First principles calculations on thermodynamic properties of 𝛂−𝐀𝐥𝟐𝐎𝟑 under pressure and temperature, Optoelectronics and Advanced Materials - Rapid Communications, 8, 11-12, November-December 2014, pp.1191-1194 (2014).

Submitted at: Sept. 20, 2013

Accepted at: Nov. 13, 2014