Zn(C3H3N2)(2): a novel diamagnetic insulator

摘要

We have prepared polycrystalline samples of Zn(C3H3N2)(2) by a liquid-inix technique. Characterization of the obtained samples has been performed with the aid of elemental, thermogravimetric, infrared spectra and X-ray powder diffraction analysis. We have measured electric permittivity (epsilon', epsilon'') ac-conductivity (sigma(ac)), magnetic susceptibility (chi) and specific heat (C-p). The obtained data indicate that this material is a new diamagnetic insulator. A maximum around 4.5 K is found in CpT-3, and it is suggested that in addition to the Debye lattice contribution, there exists a low-frequency mode assigned as an Einstein mode contribution to the total specific heat. As a main result of the study, we found epsilon' to be constant in a wide temperature range and to have a small value of 2.3 at room temperature. This feature in combination with other properties like crystallization, good thermal stability (up to 400degreesC), weak moisture sensitivity and simple synthesis makes Zn(C3H3N2)(2) to be a promising candidate for good insulating material in various applications. (C) 2003 Elsevier Inc. All rights reserved. [References: 37]