Calculation of the P-T phase diagram of nitrogen using a mean field model


Enginer Y., Algul G., YURTSEVEN H. H.

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, cilt.31, 2017 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 31 Konu: 31
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1142/s0217979217502459
  • Dergi Adı: INTERNATIONAL JOURNAL OF MODERN PHYSICS B

Özet

The P-T phase diagram is calculated at low and moderate pressures by obtaining the phase line equations for the transitions considered in nitrogen using the Landau phenomenological model. For some transitions, a quadratic coupling between the order parameters is taken into account in the expansion of free energies in terms of the order parameters. A quadratic function in T and P is fitted to the experimental P-T data from the literature and the fitted parameters are determined.