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59Co Internal field NMR analysis of Co35Fe35Ni30 alloy synthesized via novel low cost chemical reduction technique

Reddy, GS and Manjunatha, M and Ramesh, KP (2021) 59Co Internal field NMR analysis of Co35Fe35Ni30 alloy synthesized via novel low cost chemical reduction technique. In: Journal of Physics and Chemistry of Solids, 148 .

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Official URL: https://dx.doi.org/10.1016/j.jpcs.2020.109703

Abstract

We have synthesized ternary cobalt alloy using a chemical reduction process using hydrazine as a reducing agent . X-Ray Diffraction (XRD) measurements shows that the synthesized cobalt ternary alloy exists in the pure face centred cubic (fcc) phase with lattice parameter of 3.5562 ± 5 à . The SEM micrograph shows that the particles exist in the spherical shape which suggests that the particles are crystallized in fcc phase. The magnetic properties are determined using Vibrating Sample Magnetometry (VSM) and 59Co IFNMR technique. The saturation magnetization (MS) of the synthesized sample is ~80 emu/g, a slightly lower value compared to the pure cobalt metal. 59Co IFNMR technique shows that there is a broad distribution of hyperfine field (~6 T) compared to the pure fcc cobalt metal. Further, from the deconvoluted NMR peaks suggests that the variation in the nearest neighbours to the central cobalt atom leads to the different hyperfine field. © 2020 Elsevier Ltd

Item Type: Journal Article
Additional Information: The copyright of this article belongs to Elsevier Ltd
Keywords: Chemical analysis; Cobalt alloys; Costs; Iron alloys; Iron metallography; Magnetometry; Nickel metallography; Nitrogen compounds; Nuclear magnetic resonance; Saturation magnetization; Ternary alloys, Chemical reduction; Face-centred cubic; Hyperfine field; Internal field; Nearest neighbour; SEM micrographs; Spherical shape; Vibrating sample magnetometry, Cobalt metallography
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Bharath k v
Date Deposited: 07 Sep 2020 06:45
Last Modified: 07 Sep 2020 06:45
URI: http://eprints.iisc.ac.in/id/eprint/66466

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