Dielectric Constant and Pyroelectricity for the Compounds (CH2)9(NH3)2FeCl4-xBrx(X = 0 and 1)

M. A. Ahmed M. A. Mousa* M. M. El-Desoky
Physics Department, Faculty of Science, Cairo University, Giza , Egypt Chemistry Department, Faculty of Science, Benha University, Benha,Egypt. Physics Department, Faculty of Science, El-Azhar University, Cairo,Egype.

The dielectric constant as well as the pyroelectric current for the compounds (CH2)9(NH3)2FeCl4–xBrx (x ═ 0 and 1) are measured in the temperature range including the phase transition points. The effect of replacing Cl ions by Br-ions on the Puckering and the canting angle of the system is discussed together with the effect of phonon-magon interaction on the dielectric constant.


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  • Asian J. Chem. /
  •  1989 /
  •  1(3) /
  •  pp 282-288