Abstract
In the present work, the nanostructured pseudo-binary ɛ-Fe3−x Co x N and ɛ-Fe3−x Ni x N (x = 0.0–0.8) systems (10–20 nm) are studied in detail for their intrinsic magnetic properties. These systems are indexed based on the hexagonal ɛ-Fe3N phase with the space group P63/mmc. However, for the cobalt containing samples, x = 0.4–0.8, a mixture of hexagonal ɛ-Fe3−x Co x N and bcc α-Fe phases are formed and for the nickel containing systems, x = 0.5–0.8, small amount of cubic γ′-Fe4−y Ni y N is precipitated and these facts are supported by X-ray diffraction and 57Fe Mössbauer spectroscopy studies. Mössbauer studies also confirm the random occupation of the substituent elements and the superparamagnetic nature of these particles. The intrinsic magnetic properties (σ s, T c) are observed to vary with the Co and Ni contents. The low temperature magnetic properties are dominated by exchange bias phenomena and spin-glass like ordering, for these compositions.
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Gajbhiye, N.S., Ningthoujam, R.S. & Bhattacharyya, S. Magnetic Properties of Co and Ni Substituted ɛ-Fe3N Nanoparticles. Hyperfine Interact 164, 17–26 (2005). https://doi.org/10.1007/s10751-006-9229-1
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DOI: https://doi.org/10.1007/s10751-006-9229-1