lambda-transition of NH4Cl and ND4Cl at high pressures


Yurtseven H., Salihoglu S., Sen S.

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, cilt.244, ss.2589-2596, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 244 Konu: 7
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1002/pssb.200642154
  • Dergi Adı: PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
  • Sayfa Sayıları: ss.2589-2596

Özet

We predict in this study using the mean-field theory, the phase-line equation from the free energy expanded in terms of the order parameters of solid II and III phases of NH4Cl and ND4Cl close to the X-phase transitions at high pressures. Using the temperature and pressure dependence of the coefficients given in the phase-line equation, it is shown that the experimentally observed T-P phase diagram for the solid II-solid III transition, can be predicted from the mean field model studied here for both crystalline structures. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.