it is about 8 kJ/mol, which is low. It would be good to know under what conditions did you measure  this value. Is it determned from dieletcris loss tests? By time-temperature superposition? Or form AC conductivity data? The activation energy can be interpreted only if one has an idea about the physical mechanism behind it. If it is a local motion, usually there is some hopping or diffusion like motion behind it. It usually involves higher activation energy. if however, it is an elctronic process, the activation energy can be lower. So please specify the material and the conditions.

it is about 8 kJ/mol, which is low. It would be good to know under what conditions did you measure  this value. Is it determned from dieletcris loss tests? By time-temperature superposition? Or form AC conductivity data? The activation energy can be interpreted only if one has an idea about the physical mechanism behind it. If it is a local motion, usually there is some hopping or diffusion like motion behind it. It usually involves higher activation energy. if however, it is an elctronic process, the activation energy can be lower. So please specify the material and the conditions.

thank you sir for your explanation.

actually the activation energy has been calculated from the impedance measurements (maximum frequency from imaginary Z* plot) for a ferroelectric material.

Also the temperature range is from 50-160OC.

Dear Swetapadma, I am not an expert in inoragnic ferroelectric systems, therefore all I can do is to attach certain links. if you study them, you can get a general picture on dielectric phenomena in related systems and can find typical activation energy values measured by others. Comparing the experimental conditions and the materials composition you may find the clue how to interpret your own data.

http://cdn.intechopen.com/pdfs-wm/12496.pdf

https://arxiv.org/ftp/arxiv/papers/1201/1201.2061.pdf

apparently polaron activation energies are relatively low.

https://arxiv.org/ftp/arxiv/papers/1203/1203.0457.pdf

http://www.tandfonline.com/doi/abs/10.1080/00150190108015974

http://depts.washington.edu/solgel/documents/pub_docs/journal_docs/2001/10.pdf

http://link.springer.com/article/10.1007/s10854-015-3760-2

https://hal.archives-ouvertes.fr/hal-00493298/document

I hope it helps. Maybe colleagues expert in this field can give you closer explanation

thank you sir.

i will surly go through these documents