Low frequency dielectric spectroscopy on mixtures containing ferroelectric liquid crystals

Dielectric spectroscopy (frequency range 10(-1) Hz to 10(5) Hz, temperature range 300K to 370K) was employed to investigate the Goldstone mode in ferroelectric liquid-crystalline mixtures of chiral and achiral compounds. While the spontaneous polarization decreases with incresing fraction of the achiral molecules the Goldstone mode remains constant in its oscillatory strength. As expected the Goldstone mode frequency shifts to lower values with increasing amount of achiral molecules in the ferroelectric liquid-crystalline mixture.