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, sa.1, ss.21-29, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 554 Sayı: 1
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1080/00150193.2019.1684762
  • Dergi Adı: FERROELECTRICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Compendex, INSPEC
  • Sayfa Sayıları: ss.21-29
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

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.