J4 ›› 2012, Vol. 47 ›› Issue (1): 39-43.

• Articles • Previous Articles     Next Articles

First principles study of structure and thermodynamic properties of MgH2

LIU Fu-ti1,2, CHENG Xiao-hong2, ZHANG Shu-hua3   

  1. 1. Computational Physics Key Laboratory of Sichuan Province of Yibin University, Yibin 644000, Sichuan, China;
    2. School of Physics and Electronic Engineering of Yibin University, Yibin 644000, Sichuan, China;
    3. Centre for Experimental and Teaching Resource Management of Yibin University, Yibin 644000, Sichuan, China
  • Received:2011-07-25 Online:2012-01-20 Published:2012-06-29

Abstract:

Based on the first principles electronic structure and thermodynamic properties of tetragonal MgH2 with pressures up 100GPa and temperatures up to 600K were studied with a quasi-harmonic Debye model. The volumes, equilibrium lattice parameter, energy gap were obtained, and the bulk modulus, heat capacity and entropy, Debye temperature and volume thermal expansion coefficient under different pressures and temperatures were successfully calculated.

Key words: MgH2; first principles; thermodynamic properties; quasi-harmonic Debye model

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