Sm A - ferroelectric-Sm C transition in the mixture of C7+10.O.4 and in the ferroelectric C7


Aksoy S., Kurt M., Yurtseven H.

FERROELECTRICS, cilt.554, ss.21-29, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 554 Konu: 1
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1080/00150193.2019.1684762
  • Dergi Adı: FERROELECTRICS
  • Sayfa Sayıları: ss.21-29

Özet

Tilt angle and the dielectric constant (susceptibility ) as functions of the field strength and temperature, respectively are calculated from the Landau phenomenological model and they are fitted to the observed data from the literature for the Sm A - Sm C* transition in the mixture of C7 + 10.O.4. Values of the critical exponents for the order parameters (tilt angle and polarization P) and tilt angle susceptibility of C7 and of the (dielectric constant) of the mixture C7 + 10.O.4 close to are extracted from the power-law formula. Our results indicate a second-order and a weakly first-order Sm A - Sm C* transitions for C7 + 10.O.4 and C7, respectively as also observed experimentally.