The impact of ionic contribution to dielectric permittivity in 11CB liquid crystal and its colloids with BaTiO3 nanoparticles

The results of broadband dielectric spectroscopy studies of 4-Cyano-4'-undecylbiphenyl (11CB) liquid crystal and its colloids doped with paraelectric BaTiO3 nanoparticles (diameter d = 50 nm, the cubic crystal system). Studies were focused on critical-like properties in the low-frequency domain. Data was collected on cooling from 363 K to 273 K. Complex dielectric permittivity and conductivity were measured in the frequency range from 1 Hz to 10 MHz using the Novocontrol Alpha-A analyzer. Results include frequency changes in the real (ε’( f )) and the imaginary (ε’’( f )) part of the complex dielectric permittivity and the real part of the complex conductivity (σ’( f )). Files included in this collection:11CB_f.txt – the real (ε’) and the imaginary (ε’’) part of the complex dielectric permittivity, and the real part of the complex conductivity (σ’) as a function of frequency and temperature measured in the undoped 11CB sample.005_f.txt – the real (ε’) and the imaginary (ε’’) part of the complex dielectric permittivity, and the real part of the complex conductivity (σ’) as a function of frequency and temperature measured in the 11CB+0.05wt% sample.05_f.txt – the real (ε’) and the imaginary (ε’’) part of the complex dielectric permittivity, and the real part of the complex conductivity (σ’) as a function of frequency and temperature measured in the 11CB+0.5wt% sample.1_f.txt – the real (ε’) and the imaginary (ε’’) part of the complex dielectric permittivity, and the real part of the complex conductivity (σ’) as a function of frequency and temperature measured in the 11CB+1wt% sample.11CB.png – a skeletal formula of 11CB molecule.