Magnetic susceptibility and dielectric behavior of (C12H14NH3)2FexCd1−xCl4

Abstract The dielectric constant e r ′, dielectric loss tan δ and magnetic susceptibility χ M of the compounds (C 12 H 14 NH 3 ) 2 Fe x Cd 1− x Cl 4 have been studied according to the change in the magnetic ion concentration [ x =0.0, 0.1, 0.15, 0.2, 0.4, 0.6, 0.8 and 1.0] in a temperature range of 78–400 K. The size of the magnetic domain was found to vanish at iron concentrations of x ⩽0.15. The antiferromagnetic character has been observed for all samples, except that containing Fe 2+ in a concentration of x ⩽0.15. The dielectric constant and the dielectric loss are investigated in a frequency range of 1–10 3 kHz. One peak for each one of e r ′− T and tan δ − T plots has been observed at temperatures depending on the composition of the samples. The dielectric constant behavior has been explained as due to magnon–phonon interaction. The magnetostriction effect of the lattice was found to play a role in this behavior. All results have been correlated and discussed.