Zn(C3H3N2)2: a novel diamagnetic insulator |
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Authors: | B ?wia?tek-Tran V.H Tran |
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Affiliation: | a Faculty of Chemistry, University of Wroc?aw, 50-383 Wroc?aw, Poland b Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroc?aw, Poland |
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Abstract: | We have prepared polycrystalline samples of Zn(C3H3N2)2 by a liquid-mix 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 (ε′, ε″), ac-conductivity (σac), magnetic susceptibility (χ) and specific heat (Cp). The obtained data indicate that this material is a new diamagnetic insulator. A maximum around 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 ε′ 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 400°C), weak moisture sensitivity and simple synthesis makes Zn(C3H3N2)2 to be a promising candidate for good insulating material in various applications. |
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Keywords: | 65.40.Ba 77.22.&minus d 77.84.Jd |
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