magnetoabsorption and magnetic hysteresis in ni ferrite nanoparticles
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2013
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Abstract
Nickel ferrite nanoparticles were prepared by a modified sol-gel technique employing coconut oil, and then annealed at different temperatures in 400-1200 °C range. This route of preparation has revealed to be one efficient and cheap technique to obtain high quality nickel ferrite nanosized powder. Sample particles sizes obtained with XRD data and Scherrer’s formula lie in 13 nm to 138 nm, with increased size with annealing temperature. Hysteresis loops have been obtained at room temperature with an inductive method. Magnetic field induced microwave absorption in nanoscale ferrites is a recent an active area of research, in order to characterize and explore potential novel applications. In the present work microwave magnetoabsorption data of the annealed nickel ferrite nanoparticles are presented. These data have been obtained with a system based on a network analyzer that operates in the frequency range 0 - 8.5 GHz. At fields up to 400 mT we can observe a peak according to ferromagnetic resonance theory. Sample annealed at higher temperature exhibits different absorption, coercivity and saturation magnetization figures, revealing its multidomain character.
| Reference Key |
c.2013epjmagnetoabsorption
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|---|---|
| Authors | ;Torres C.;Valente M. A.;Muñoz J. M.;Hernández-Gómez P.;de Francisco C. |
| Journal | utilitas mathematica |
| Year | 2013 |
| DOI |
10.1051/epjconf/20134017003
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