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Tunable Morphology and Magnetic Properties of Bi2Fe4O9 Nanocrystal Synthesized by Hydrothermal Method

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Abstract:

Bi2Fe4O9 nano and micron powders have been synthesized by a hydrothermal method. The asobtained samples are pure phase and crystallize in the orthorhombic structure. Diverse particle morphologies, including nanoplates, nanospheres, microcubes, and microcylinders, are obtained under different synthesis conditions. The solvent N,N-Dimethylformamide (DMF), together with the mineralisers NaOH and NH4OH, are found to be the key factors for the formation of the particles with their diverse morphologies and sizes. The magnetization dependence of temperature (M–T), observed in a field of 1000 Oe from 10 to 340 K, and M–H loops measured at 10 K indicate that the Bi2Fe4O9 particles are paramagnetic at room temperature and undergo an antiferromagnetic transition at a NĂ©el temperature (TN) of 250 K.

Keywords: BISMUTH FERRITE; MAGNETIC; NANO; TUNABLE MORPHOLOGY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.2712

Publication date: March 1, 2011

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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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