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MAGNETIC BEHAVIOR OF FUNCTIONALLY MODIFIED SPINEL Ni0.4Ca0.6Fe2O4 NANOFERRITE.
- Source :
- International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics; 6/10/2011, Vol. 25 Issue 14, p1971-1980, 10p, 2 Charts, 5 Graphs
- Publication Year :
- 2011
-
Abstract
- Spinel nanoferrites of composition Ni<subscript>0.4</subscript>Ca<subscript>0.6</subscript>Fe<subscript>2</subscript>O<subscript>4</subscript> have been synthesized by sol-gel method and subsequently coated with intrinsically conducting polymers such as polyaniline and polypyrrole separately, using chemical oxidative polymerization technique. The characterization of the composites has been performed by X-ray diffraction and atomic force microscopy images. The room temperature DC electrical conductivity measurements are performed in order to understand the coating effectiveness and the nature of electrical conductivity of the composites. The Mössbauer spectroscopic studies reveal that the ferrimagnetic as well as super-paramagnetic states co-exist at room temperature (300 K) for all the samples which is found in good agreement with the DC magnetization measurement results, wherein the coercivity is observed in the M-H curves for all the samples at room temperature. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02179792
- Volume :
- 25
- Issue :
- 14
- Database :
- Complementary Index
- Journal :
- International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 61407910
- Full Text :
- https://doi.org/10.1142/S0217979211100679