In my sample, two plateau is observed at low and high frequency region. i have tried it by using double power law equation using 8.6 origin but i did't get fiitting. Kindly help me how to simulate it by double power law. i have attached a image of spectra . please have a look on this.
Dear colleague Sandeep Kumar,
Have a nice time and good day.
You extract the data of each plateau in a single file [Ex: 1st plateau, 2nd plateau]
the you draw each data in a single figure then you can get the fitting.
Please see the attached file.
I wish this is useful and help you.
Yours
A. Eldenglawey
Dear Sandeep,
you do not give enough information about your sample, what it is, what kind of electrodes you use, what is the geometry.
Looking at your data (I presume that it is a plot of log(real part of complex conductivity) versus log (frequency) , my first guess is that the high frequency plateau is due to bulk response (one parallel R,C term) and the other is due to the response from the electrode-sample interface region (second parallel R,C term). First after you have fitted this simple equivalent circuit (the two terms arein series !!),you can see whether there is also "power law" response (universal dielectric relaxation). Be aware it might originate from within the interface layer only). If it is there, Havrilliak-Negami universla capacitor should be put in parallel with either the first term(if bulk) or the second term(if originating from within interface region).
I hope this will help you on the way.
With best regards
Petr
It is not easy to fitter by double laws of jonscher which models the electric conductivity by jump. several techniques exist to show that the conductivity has been modeled by Jonscher's double power law.
there is permittivity, formalism of modulus and convolution and deconvolution by Zview software
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