Abstract
New lactic acid derivatives exhibit paraelectric SmA and TGBA phases, ferroelectric SmC* and TGBC phases and antiferroelectric phases, the TGB and antiferroelectric phases being unusually broad. The polymorphism depends on the number of lactate units in the chiral chain and on the length of the non-chiral chain. The dielectric spectroscopy revealed the characteristic modes in all these phases. In phases with the dipolar order the spontaneous polarization and the tilt angle have been determined.
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