Magnetic properties of polypyrrole-coated iron oxide nanoparticles
Authors:
- 2 September 2005
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 38 (18) , 3354-3359
Abstract
Iron oxide nanoparticles were prepared by sol -gel process. Insitu polymerization of pyrrole monomer in the presence of oxygen in iron oxide ethanol suspension resulted in a iron oxide - polypyrrole nanocomposite. The structure and magnetic properties were investigated for varying pyrrole concentrations. The presence of the gamma - iron oxide phase and polypyrrole were confirmed by XRD and FTIR respectively. Agglomeration was found to be comparatively much reduced for the coated samples, as shown by TEM. AC susceptibility measurements confirmed the superparamagnetic behaviour. Numerical simulations performed for an interacting model system are performed to estimate the anisotropy and compare favourably with experimental results.Keywords
All Related Versions
This publication has 25 references indexed in Scilit:
- Composition dependent magnetic properties of iron oxide-polyaniline nanoclustersJournal of Applied Physics, 2004
- NanomagneticsJournal of Physics: Condensed Matter, 2003
- Electromagnetic Wave Shieding Effectiveness of Carbon Fiber Sheet Coated Ferrite Film by Microwave-Hydrothermal ProcessInternational Journal of Modern Physics B, 2003
- Anomalous variation of coercivity with annealing in nanocrystalline NiZn ferrite filmsJournal of Applied Physics, 2002
- Annealing study of Fe2O3 nanoparticles: Magnetic size effects and phase transformationsJournal of Applied Physics, 2002
- Nanocomposite of polypyrrole-iron oxide by simultaneous gelation and polymerizationSynthetic Metals, 2002
- Preparation, characterization and optical properties ofα-Fe2O3 films by sol-spinning processBulletin of Materials Science, 1998
- Magnetite phase due to energetic argon ion irradiation from a dense plasma focus on hematite thin filmPhysics Letters A, 1997
- Coating of uniform inorganic particles with polymers: III. Polypyrrole on different metal oxidesJournal of Materials Research, 1995
- Preparation and characterisation of novel polypyrrole–silica colloidal nanocompositesJournal of Materials Chemistry, 1994