Dielectric Behaviour of Potassium Acetylacetonate

• Authors: T. Abdel-Malik , M. Kassem , R. Abdel-Latif , S. Khalil
• Languages of publication: EN

Abstracts

EN

The dielectric constant and the dielectric loss of potassium acetylacetonate, K(acac), are measured as a function of both temperature and frequency. A peak value is obtained at the a critical temperature T_{c} = 313 K. X-ray analysis revealed that at T_{c}, K(acac) undergoes phase transition from orthorhombic to triclinic structure. The Cole-Cole diagrams have been used to determine the molecular relaxation time τ. The temperature dependence of τ is expressed by thermally activated process. The impedance spectra in the frequency range from 50 Hz to 500 kHz plotted in the complex plane show semicircles. The conduction mechanism, below T_{c}, is predominantly operating at the surface. Above T_{c}, the conduction is proceeding in the bulk material with contribution from the surface.

Keywords

EN

77.40.+i

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1992
• Volume: 81
• Issue: 6
• Pages: 681-686

Dates

published

1992-06

received

1992-02-18

(unknown)

1992-04-03

Contributors

author

T. Abdel-Malik

• Department of Physics, Faculty of Science, El-Minia University, Egypt

author

M. Kassem

• Department of Physics, Faculty of Science, Alexandria University, Alexandria, Egypt

author

R. Abdel-Latif

• Department of Physics, Faculty of Science, El-Minia University, Egypt

author

S. Khalil

• Department of Physics, Faculty of Science, Alexandria University, Alexandria, Egypt

Identifiers

DOI

10.12693/APhysPolA.81.681