Abstract
The study of the system ZnO·xV2O5 has shown that the various phases obtained by different cooling rates have ESR line-shapes which are very dissimilar. It has been shown that the amorphous phase is characterized by a well resolved hyperfine structure and that the ZnV2O6 phase has a very asymmetrical line-shape which closely resembles those studied in the magnetic resonances in metals. To verify the role played by the skin depth in causing this asymmetry, the measurements have been carried out at various microwave frequencies particularly in the low range of frequencies where the lines become symmetrical. This behaviour can be explained by assuming that the low frequency skin depth of the samples containing a high amount of ZnV2O6 is of the same order of the sample size. The use of this assumption permits an evaluation of the sample conductivity (about 5×10−2 Ω−1 cm−1) which is close to the measured values (about 10−3 Ω−1 cm−1).
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