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Synthesis, Characterization and Magnetic Interactions Study of ε-Fe3N–CrN Nanorods

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The ε-Fe3N–CrN composite nanorods are synthesized by wet chemical technique. XRD-Rietveld analysis shows that ε-Fe3N and CrN crystallize in the space group P63/mmc and Fm3m with relative mass compositions 53% and 47%, respectively. The nanorods have an average diameter ∼30 nm and length ∼400 nm X-ray photoelectron spectroscopy (XPS) studies show the presence of nitrides and oxynitrides (Fe–O–N/Cr–O–N) at the surface and the presence of elemental Cr in CrN matrix along with the nitrides inside the nanorods, probed by the in-depth profile analysis. The magnetic interactions between the spins of ferromagnetic (FM) ε-Fe3N and antiferromagnetic (AF) CrN throughout the volume of the nanorods give rise to exchange bias coupling. The exchange bias phenomenon is influenced by the rough and non-uniform AF-FM interface and spin-glass-like ordering at lower temperatures. The ac susceptibility studies confirm the spin-glass-like ordering.
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Document Type: Research Article

Publication date: 2007-06-01

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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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