The structural, elastic and thermodynamic properties of intermetallic compound CeGa2


ÇİFTCİ Y. , Colakoglu K., ÇOBAN C., DELİGÖZ E.

CENTRAL EUROPEAN JOURNAL OF PHYSICS, cilt.10, sa.1, ss.197-205, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 10 Konu: 1
  • Basım Tarihi: 2012
  • Doi Numarası: 10.2478/s11534-011-0012-9
  • Dergi Adı: CENTRAL EUROPEAN JOURNAL OF PHYSICS
  • Sayfa Sayıları: ss.197-205

Özet

The structural, elastic and thermodynamic characteristics of CeGa2 compound in the AlB2 (space group: P6/mmm) and the omega trigonal (space group: P-3m1) type structures are investigated using the methods of density functional theory within the generalized gradient approximation (GGA). The thermodynamic properties of the considered structures are obtained through the quasi-harmonic Debye model. The results on the basic physical parameters, such as the lattice constant, the bulk modulus, the pressure derivative of bulk modulus, the phase-transition pressure (P (t) ) from P6/mmm to P-3m1 structure, the second-order elastic constants, Zener anisotropy factor, Poisson's ratio, Young's modulus, and the isotropic shear modulus are presented. In order to gain further information, the pressure and temperature-dependent behavior of the volume, the bulk modulus, the thermal expansion coefficient, the heat capacity, the entropy, Debye temperature and Gruneisen parameter are also evaluated over a pressure range of 0-6 GPa and a wide temperature range of 0-1800 K. The obtained results are in agreement with the available experimental and the other theoretical values.