Dear friends,

As I introduced before, I am a researcher in the field of electrical and magnetic properties of composites including magnetic nanoparticles and liquid crystals, and now I have a question about the behavior of dielectric function of pure nematic liquid crystal and I hope I can use your experience in this field.

The liquid crystal that I have used for the research is E7. it has been filled with capillary method in cells coated with PVA as rubbing layer and the thickness of the cells is about 38 micrometers and their area is about 0.5 square centimeters. The impedance spectroscopy is performed using the Nova EIS device in the frequency range of 1 MHz to 0.01 Hz and the obtained Nyquist plot is acceptable. I attach the nyquist plot and phase change figures with excell codes.

The subject of my question is about the behavior of the real and imaginary part of the permittivity, which when I get it using the relationships I attached, the curves (especially the imaginary part)  are contrary to the values ​​reported in some other articles, such as "Impedance and dielectric spectroscopy study of graphene doped liquid crystal E7" .

Have you encountered this during the study of the behavior of pure nematic liquid crystal and that the use of thicker cells can be an effective factor in this issue? Are my permittivity curves acceptable?