Landau mean-field model with the cubic term for the alpha-beta transition in quartz


Ates S., Yurtseven H.

BULLETIN OF MATERIALS SCIENCE, cilt.43, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 43 Konu: 1
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s12034-020-02127-1
  • Dergi Adı: BULLETIN OF MATERIALS SCIENCE

Özet

Thermodynamic quantities are calculated as a function of temperature by using Landau mean-field model for the alpha-beta transition in quartz. By expanding the Gibbs free energy in terms of the order parameter (Q) with the cubic term (Q(3)), the temperature dependence of the relevant thermodynamic quantities are predicted using the heat capacity (C-P), which is fitted to the experimental data from the literature for the alpha-beta transition in quartz. Our results indicate that the Landau mean-field model is adequate to describe the first-order alpha-beta transition in quartz.