here i attach nyquist plot of my sample. when i try to fit it in z-view it looks like non-debye type semicircle so i used constant phase element rather than capacitor. but i am confuse that whether my nyquist plot contains grain at high frequency, grain boundary at mid frequency, electrode-electrolyte effect at lower frequency and further the tail observed at last contain only constant phase element. please check it whether my sample contain grain,grain boundary,electrode-electrolyte effect and CPE at the end and suggest me equivalent circuit and suggest me how to justify all these effects in complex modulus spectra.
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it will open in z-view software, i also attach the excel sheet of z' and z'' value along with images of complex impedance and complex modulus graph. please suggest me the correct phenomena and circuit fitting
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