Effect of Confinement on Polarization Sign Inversion Temperature in Ferroelectric Liquid Crystal |
| S.A. Różański
Stanisław Staszic State University of Applied Sciences in Piła, Department of Electrical Engineering, Podchorążych 10, 64-920 Piła, Poland |
| Full Text PDF |
| Dielectric spectroscopy of the ferroelectric liquid crystal S-(-)-2-methylbutyl 4-n-nonanoyloxy-biphenyl-4'-carboxylate shows the occurrence of an anomaly in temperature dependence of the dielectric strength of the Goldstone mode related with a spontaneous polarization sign reversal present in this liquid crystal compound. Particular attention was paid to the dependence of the inversion temperature on aerosil nanoparticles density. Generally, the inversion temperature decreases with increasing aerosil density as a result of a hydrogen-bonded gel structure formed in the ferroelectric liquid crystal. Both the size effects and the interaction of the liquid crystal molecules with the aerosil surfaces play an important role. |
DOI:10.12693/APhysPolA.139.417 topics: dielectric spectroscopy, ferroelectric liquid crystal, confinement, polarization sign reversal |