I have measured the frequency variation of Z" at different temperature above the room temperature and observed a peak in Z" spectrum. Generally, frequency corresponding to the maximum of Z" i.e., peak frequency shift towards higher frequency side with the increase in temperature, so that the peak frequency obeys the Arrhenius law. Interestingly, in my sample, it is found that the peak frequency shifts towards the lower frequency side with the increase in temperature within a certain range of temperature (RT - 150 C). Moreover, it is found that the value of Z" too increase with increase in temperature.
What could be the reason? Can it happen?
Dear Bipul,
You did not explain what kind of a sample you are measuring. The abnormal behavior might result from side-effects. You also cannot exclude a possible evolution of the sample as a function temperature, that is, possible in-situ annealing of the sample during your measurements. In any case, detailed information about the sample is necessary to analyze your experimental results.
Regards,
L.B. Magalas
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