%0 Journal Article
%T Structural, Dielectric, Optical and Magnetic Properties of Ti3+, Cr3+, and Fe3+: PVDF Polymer Films
%A M. Obula Reddy
%A L. Raja Mohan Reddy
%J Journal of Polymers
%D 2013
%R 10.1155/2013/295291
%X Highly transparent and very clear nature of PVDF: Ti3+, PVDF: Cr3+, and PVDF: Fe3+ polymer films of good quality have been synthesized by employing solution casting method. XRD profiles have confirmed semicrystalline structures in -, -, and -PVDF phases. IR spectra have confirmed these findings and revealed some structural defects such as monofluorinated alkenes. Emission spectra reveal that PVDF: Ti3+ has a blue emission, PVDF: Cr3+ has blue emission, and PVDF: Fe3+£¿£¿red emission was observed. The conductivity and dielectric measurements have also been carried out as function of frequency and temperature changes. Due to the presence of the transition metal ions in these films, significant improvement in the ionic conductivity has been noticed. The dielectric behaviors of these films have been analyzed using dielectric permittivity ( ), dissipation factor (tan£¿ ), and impedance spectra (Z1 and Z11). VSM measurements have confirmed that the PVDF: Ti3+ exhibits antiferromagnetic nature, PVDF: Cr3+ film ferromagnetic nature, and PVDF: Fe3+ film strong paramagnetic nature. Thus, the present study has successfully explored the fact that these optical materials are also potential enough in both conductivity and magnetic properties for their use in applications suitably. 1. Introduction Polymer based magnetoelectric materials are promising materials such as conductive adhesives, supported catalysts, sensors, luminescent films, electrooptical devices, integrated optics, memory devices, and optical data processing technologies, and it is possible to achieve impressive enhancements of material properties as compared with the pure polymers, as being metal free and environmentally acceptable, due to the polymers unique characteristics such as flexibility, light weight, versatility, and low cost, and in some cases, biocompatibility can be taken to advantage [1¨C8]. As a semicrystalline polymer, poly(vinylidene fluoride) (PVDF) is fit for membrane material due to its excellent chemical resistance, physical and thermal stability, high strength, high dielectric constant, and flexibility. Another feature that distinguishes PVDF from other polymers is its polymorphism; that is, it may present at least four crystalline phases of ¦Á, ¦Â, ¦Ä, and ¦Ã. Moreover, an increasing interest has been devoted to PVDF in the development of electric or magnetic field sensors. For this application PVDF was added with transition metal (Ti3+, Cr3+ and Fe3+) ions to evaluate their electrical and magnetic properties. 2. Experimental Study 2.1. Sample Preparation and Characterization The
%U http://www.hindawi.com/journals/jpol/2013/295291/