Thermal analysis, AC conductivity and dielectric relaxation in Bis(2-methoxyanilinium) hexabromidostannate(IV) dihydrate: (C7H10NO)2SnBr6·2H2O

• Published in: Journal of materials science. Materials in electronics Vol. 28; no. 21; pp. 15835 - 15845
• Main Authors: Chouaib, H., Karoui, S., Kamoun, S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.11.2017; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Dielectric properties; Dielectric relaxation; Differential scanning calorimetry; Electrical properties; Electrical resistivity; Heat measurement; Impedance; Materials Science; Morphology; Nyquist plots; Optical and Electronic Materials; Phase transitions; Single crystals; Software; Spectroscopic analysis; Thermal analysis; Thermogravimetric analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-7478-1

The (C 7 H 10 NO) 2 SnBr 6 ·2H 2 O compound is characterized by using the X-ray powder analysis, thermogravimetric analyses, differential scanning calorimetry (DSC) and complex impedance spectroscopic data. This compound exhibits a phase transition at 300 K which is characterized by differential scanning calorimetry, AC conductivity and dielectric measurements. The measurements of impedance spectroscopic are carried out in the frequency range from 100 Hz to 1 MHz with temperatures varying between 275 and 330 K. The impedance measurements indicate that the electrical properties are strongly temperature dependent. Nyquist plots (−Z′′ versus Z′) show that the conductivity behavior is accurately represented by an Rp//CPE equivalent electrical circuit model. Besides, the frequency dependence of conductivity follows Jonscher’s dynamical law with the relation: σ ( ω , T ) = σ D C + A ( T ) ω S ( T ) . The relaxation mechanism can be observed in the complex modulus analysis M * and the complex polarizability α * .