  The report shows the temperature behavior of the real part of dielectric
permittivity in the static (dielectric constant) and lo-frequency (LF) domains
in bulk samples of 11CB and BaTiO3-based nanocolloids. The study covers the
Isotropic Liquid (I), Nematic (N), Smectoc A (SmA) and Solid CRystal (Cr)
phases. For each phase, the dominance of pretransitional fluctuations,
significantly moderated by nanoparticles is shown. The authors consider
separate focus on dielectric constant(Eps(T)) evolution in the static domain
yielding mainly response from permanent dipole moments and their arrangement
and in the low-frequency (LF) domain DeltaEps'(f)=Eps'(f)-Eps(where Eps'(f) is
for the real part of dielectric permittivity in the LF domain).which is
associated solely with ionic-related polarization mechanism. All these lead to
new experimental evidence concerning I-N, N-SmA and SmA-Cr transitions.focusing
on the strength and extent of pretransitional effects, critical exponents and
phase transition discontinuities. The strong evidence for pretransitional
effects near SmA-N transition is notable, particularly regarding
DeltaEps'(f,T). Studies are supplemented by DC electric conductivity - the
parameter also related to LF domain. Finally, the validity of the relation
Eps'(f,T) = Af^(-3/2)+Eps (where f stands for the frequency and A is a constant
parameter) often used for discussing dielectric spectra in LC compounds and its
nanocollids in the LF domain, is examined.
