From Nyquist plot to real conductivity spectra (sigma)

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SUMMARY

The discussion focuses on converting Nyquist plots of impedance into real conductivity versus frequency plots. The user seeks a mathematical method to achieve this transformation, specifically from the Nyquist plot's imaginary and real components to the desired conductivity spectrum. The conversation emphasizes the importance of understanding the relationship between admittance and conductivity, as well as the need for clarity on the formulas used in this conversion process.

PREREQUISITES
  • Understanding of Nyquist plots in impedance spectroscopy
  • Familiarity with complex conductivity and its components
  • Knowledge of admittance and its mathematical relationships
  • Basic skills in data analysis and mathematical transformations
NEXT STEPS
  • Research the mathematical formulas for converting admittance to real conductivity
  • Study the principles of impedance spectroscopy and Nyquist plots
  • Learn about complex conductivity and its interpretation in frequency domains
  • Explore software tools for visualizing and analyzing impedance data
USEFUL FOR

This discussion is beneficial for physicists, materials scientists, and electrical engineers involved in impedance spectroscopy and those looking to analyze conductivity data effectively.

Olha
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TL;DR
From Nyquist plot to real conductivity spectra (sigma) vs frequency
Hi, I have data of impedance but due to limitation of software after measurement I do not receive numerical values for admittance and real conductivity vs frequency. How mathematically I can convert Nyquist plot into plot real conductivity vs frequency?
conductivity spectra.jpg
 
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Your plot already shows the real part of the complex conductivity. Do you need the imaginary part?
 
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Likes   Reactions: Lord Jestocost
The image is the result I want to get. For now I have Nyquist plot Im vs Re, which I would like to transform it to the plot you see attached, real part of complex conductivity vs frequency. I have done it trough admittance but I am not sure in all formulas I used for it...
 
Please, show us your method.
 
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Likes   Reactions: SammyS

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