Physics – Condensed Matter – Materials Science
Scientific paper
2004-07-27
Physics
Condensed Matter
Materials Science
9 (nine) pages, 6 figures (jpeg and eps)
Scientific paper
10.1063/1.1829788
Gamma - Iron Oxide prepared by sol -gel process was used to produce nanocomposites with polyaniline of varying aniline concentrations. TEM shows the presence of chain like structure for lower polyaniline concentration. The room temperature hysteresis curves show finite coercivity of 160 Oe for all the composites while the saturation magnetization was found to decrease with increasing polymer content. ZFC - FC magnetisation measurements indicate high blocking temperatures. It is believed that this indicates a strongly interacting system, which is also shown by our TEM results. Monte Carlo simulations performed on a random anisotropy model with dipolar and exchange inteactions match well with experimental results.
Annapoorni S.
Inoue Akihisa
Lamba Subhalakshmi
Sharma Parmanand
Sharma Raksha
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