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Vibrational spectroscopic study of Sr 2 ZnTeO 6 double perovskites

2009; Wiley; Volume: 41; Issue: 6 Linguagem: Inglês

10.1002/jrs.2494

1097-4555

Anderson Dias, Subodh Ganesanpotti, M. T. Sebastian, Roberto L. Moreira,

Multiferroics and related materials

Abstract Sr 2 ZnTeO 6 ceramics were prepared by the solid‐state route and their vibrational phonon modes were investigated using optical spectroscopic techniques, for the first time. X‐ray diffraction (XRD) and Raman and infrared spectroscopies were employed to investigate the structures of these perovskite materials and the results analysed together with group‐theoretical predictions. The number and behaviour of the first‐order modes observed in both spectroscopic techniques are in agreement with the calculations for a tetragonal I 4/ m space group. The complete set of the optical phonon modes was determined, and the intrinsic dielectric properties of the materials were evaluated, allowing us to discuss their potential application in microwave (MW) circuitry. Copyright © 2009 John Wiley & Sons, Ltd.