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

• Authors: H. Abdelmoneim
• Languages of publication: 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.

Keywords

EN

72.80.Ph; 77.22.Ch; 77.84.Bw

Discipline

• 77.84.Bw: Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.
• 77.22.Ch: Permittivity (dielectric function)(for low-permittivity dielectric films, see 77.55.Bh; for high-permittivity gate dielectric films, 77.55.D-)
• 72.80.Ph: Liquid semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 6
• Pages: 936-940

Dates

published

2010-06

received

2008-11-13

(unknown)

2009-10-10

(unknown)

2010-05-05

Contributors

author

H. Abdelmoneim

• Physics Department, Faculty of Science, Cairo University, Giza, Egypt

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Identifiers

DOI

10.12693/APhysPolA.117.936