Relaxation phenomena in EDAMn1−xCdxCl4 perovskite; 0≤ x ≤ 1 perovskite
2005
Ahmed, M. A. | Bishay, S. T. | Gabal, M. A. | Helmy, N.
The electrical properties measurements were carried out for the complex (CH₂)₂Mn₁₋ₓCdₓCl₄, 0.0 ≤ x ≤ 1.0 at different temperatures as a function of frequency (100–1000 kHz). Four transition points were obtained for x = 0.5, which were assigned as thermochroism, interlayer exchange interaction, order-disorder and chain melting transition. The presence of more than one straight line in the conductivity data clarifies the presence of more than one conduction mechanism, and the calculated values of the activation energy indicate the semiconducting characteristics of the investigated complexes. The values of the relaxation time depend on Cd-content as well as the heating temperature. The expected critical concentration at x = 0.5 agrees well with the percolation theory of Mont-Carlo group. The IR spectra indicate that, the force constant of the bonds and the atomic mass vibration are affected by Cd-content.
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