The real part of the relative permittivity ε′t as well as the dielectric loss as represented by ε″t for the compounds (CH2)x(NH3)2MCl4-xBr x (where x = 0, 2, n = 2, 3 and M = Cu, Co) have been measured. The measurements were carried out as a function of temperature and frequency. Both ε′t and ε″t show the same relaxation phenomena which involves large reorientable dipoles in the total polarization. The phase transition observed at ∼312K for ε′t and ε″t is expected from the variation in the spacing between the adjacent metallic layers arising from the increase in the number of carbon atoms and/or introducing Br- ions in the out of plane position.
Cited By (since 1996):2Export Date: 11 February 2014Source: ScopusCODEN: PHSTBLanguage of Original Document: EnglishCorrespondence Address: Ahmed, M.A.; Physics Departement, Faculty of Science, Cairo University, Giza, Egypt