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Title of Journal: J Nanopart Res

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Abbravation: Journal of Nanoparticle Research

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Springer Netherlands

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DOI

10.1016/0009-2614(93)e1417-f

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1572-896X

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Synthesis and magnetic characterization of CoMoNS

Authors: Sayan Bhattacharyya Sajith Kurian S M Shivaprasad N S Gajbhiye
Publish Date: 2009/05/01
Volume: 12, Issue: 4, Pages: 1107-1116
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Abstract

A new ternary nitride CoMoN2 was prepared in the nanosize regime of 90 ± 20 nm by nitridation of the precursor intermetallic nitride Co3Mo3N XRD–Rietveld analysis revealed the presence of 060 ±002 mass of Co impurity phase The calculated space groups of CoMoN2 and Co are P6 3 /mmc and Fm3m respectively The N atoms lie at the interstitial sites and the 12 calculated nitrogen sites indicate the presence of a layered structure The XPS studies indicated the presence of the nitride and surface oxynitride/oxide phases CoMoN2 is an interstitial nitride with Co and Mo in the zero oxidation state The room temperature susceptibility is estimated after subtracting the ferromagnetic contribution from cobalt and found to be 27 × 10−4 emu g−1 Oe−1 indicating the Pauliparamagnetic nature The ferromagnetic exchange interactions between the Co atoms in CoMoN2 are reduced due to the presence of Mo and N in the crystal lattice The hysteresis loop shift 19 Oe is attributed to the demagnetizing dipolar fields created in the soft CoMoN2 phase by the hard Co phase

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