The Permittivity and AC Conductivity of the Layered Perovskite [(CH3)(C6H5)3P]2Hgl4

Abstract

The dielectric permittivity and ac conductivity of bis-(Methyltriphenyl-phosphonium)2tetraiodo- mercurate (II), [(CH3)(C6H5)3P]2HgI4, has been measured in at 300-400 K and 0.11-20 kHz. The frequency dependent conductivity is interpreted in terms of the jump relaxation model, where translational and reorientational hopping takes place. The conductivity results were fitted to the law [formula omitted] The temperature dependence of the conductivity was fitted to two relaxation processes. The activation energies δE1 and δE2 are frequency dependent and lie in the ranges of 0.8 eV and 0.2 eV. δE1 is associated with translational long range hopping while, δE2 is associated with localized and/or reorientational hopping. PACS Nos. 76, 77. © 2014, Verlag der Zeitschrift für Naturforschung. All rights reserved.