Reply to “Electrical properties analysis of materials with ferroic order”

Abstract

We thank the authors for the interest they have given to our paper (M. Smari et al., RSC Advances, 2015, 5, 2177), but we find that their comment is oriented according to their previous work and to their own vision of data analysis.

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The comment is based on the fact that the Curie–Weiss law is valid for static permittivity and the authors state that there is no experimental data for static dielectric permittivity. We propose that the dielectric permittivity is deduced from the variation of the capacitance with frequency in the range 40 Hz to 10 MHz. For each silver content, the capacitance spectrum is composed of a plateau followed by a decrease with frequency. All values of the permittivity are taken in the plateau region. So they merge with the static permittivity.

The doping of perovskite modifies the temperature of dielectric transition. Such transitions can disappear or occur outside the studied range of temperature. We conclude that the dielectric transition is observed in La_0.5Ca_0.1Ag_0.4MnO₃ and not in La_0.5Ca_0.5MnO₃ according to experimental and reproducible data.

Finally, as indicated below ε′ is deduced from the capacitance measurement and ε′′ is deduced from the measurement of tan δ. So an analysis based on expression (2) and (3) are meaningless.

The Curie–Weiss behavior was verified for other values of silver content. The results were published in ref. 1.

We agree that further studies, specially at high frequency, are necessary to identify the dielectric behaviour of this compound.

References

1. H. Rahmouni, B. Cherif, M. Smari, E. Dhahri, N. Moutia and K. Khirouni, Effect of exceeding the concentration limit of solubility of silver in perovskites on the dielectric and electric properties of half doped lanthanum–calcium manganite, Phys. B, 2015, 473, 1–6.

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