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2010 | 117 | 6 | 936-940
Article title

Dielectric and AC Conductivity οf Potassium Perchlorate, KCLO_{4}

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EN
Abstracts
EN
The AC conductivity σ (ω) and the complex dielectric permittivity ε*(ω) were studied as function of temperature 300 K < T < 600 K and at some selected frequencies (1-20 kHz) for polycrystalline sample of KClO_4. The differential thermal analysis (DTA) thermograph was also performed. The combined data support each other and indicate the existence of a structural phase transition at ≈ 575 K. Moreover, the temperature dependence of the ac conductivity behaves in accordance with Arrhenius relation, whereas the frequency dependent conductivity obeys the power law σ(ω) = Aω^{s(T)}. The behavior of s with temperature suggests that the hopping over the barrier model prevails. No evidence for the existence of a ferroelectric phase transition at the transition temperature.
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EN
Contributors
  • Physics Department, Faculty of Science, Cairo University, Giza, Egypt
References
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Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv117n609kz
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