Please see in the attachement,
I prepared iron thin films on ITO substrate and I measured resistance,
however the graph dont start from same point, why would something like that happend?
in this cole-cole plot it resembles that your samples have two type of dopants
Dr Ashwajeet J S thank you for reply, Yes I used two conditions for doping, N and C, I didnt know it is obvious, what else can you see?
Independently of doping; Your signals exhibit a shift in the Re-axis together with negative points at the highest frequencies which it can be due to the kind and forme of your contact and the electrode wires. The equivalent circuit can be like R1(R2//C2)(R3//C3) but some contributions collapse .The shift is considerable and it is in same order of sample resistance ???
Adel Madani thank you for comment, I used on working electrode ITO clips, clipers and submerge in solution to not touch it. What contributions collapse? Yes it is in same order.
bulk and grain boundaries contributions may collapse . Your semi-circles atre distorted.
The EIS results you have shown appear to have some deviation in the low-frequency region, which can have several reasons. The most common reasons for this deviation are:
It is advisable to verify the uniformity and quality of your electrodes, and to monitor the concentration of the electrolyte and its temperature during the EIS measurement. It is also important to note that EIS is a powerful technique for characterizing the electrochemical behavior of systems, but it is not a perfect measurement technique and deviation in results can occur.
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