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Nanocrystalline Cubic CuFe2O4: Size Dependent Transition from Ferrimagnetic to Superparamagnetic Behaviour

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Nanocrystalline cubic CuFe2O4 have been prepared by co-precipitation method. The experimental conditions have been controlled to produce CuFe2O4 with particle size 18nm, 7.2 nm, and 3.2 nm as calculated by Scherrer formula. Room temperature Mössbauer spectra show that 18nm and 7.2 nm CuFe2O4 exhibit ferrimagnetism while 3.2 nm CuFe2O4 exhibits superparamagnetism. The cationic distribution calculated using Mössbauer spectra confirm to the cubic structure confirming the findings of XRD study. XPS data corroborates the finding. Low temperature Mössbauer measurements on 3.2 nm particles show gradual transformation to ferrimagnetic state.
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Document Type: Research Article

Publication date: 01 June 2007

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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