Air-stable magnetic cobalt-iron (Co7Fe3) bimetallic alloy nanostructures via co-digestive ripening of cobalt and iron colloids

Amsarajan, S and Jagirdar, BR (2020) Air-stable magnetic cobalt-iron (Co7Fe3) bimetallic alloy nanostructures via co-digestive ripening of cobalt and iron colloids. In: Journal of Alloys and Compounds, 816 .

PDF Air_Sta_Mag_2020.pdf - Published Version Restricted to Registered users only Download (3MB) | Request a copy

Abstract

Phase pure Co7Fe3 alloy magnetic nanostructures were successfully synthesized by co-digestive ripening of Fe/Co-toluene nanoparticles in mesitylene in the presence of hexadecyl amine (HDA). Controlled heat treatment of as-synthesized samples under anaerobic conditions showed a transformation of disordered-to-ordered crystal structure, which was confirmed by PXRD and TEM measurements. This also resulted in carbonization of HDA over the nanoparticles surface rendering them air-stable. Magnetic measurements of these carbon-encased samples revealed enhanced saturation magnetization (MS) values compared to the as-prepared samples. The zero field cooling (ZFC) and field cooling (FC) curves demonstrated that Co7Fe3 nanoparticles exhibit ferromagnetic behaviour at room temperature. These air-stable Co–Fe magnetic nanostructures have immense potential for applications as soft magnets

Item Type:	Journal Article
Publication:	Journal of Alloys and Compounds
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd
Keywords:	Binary alloys; Carbonization; Cobalt; Crystal structure; Nanoparticles; Nanostructured materials; Saturation magnetization; Synthesis (chemical), Anaerobic conditions; Bimetallic; Digestive ripening; Ferromagnetic behaviour; Magnetic; Magnetic nanostructures; SMAD; Zero-field cooling, Nanomagnetics
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	01 Feb 2023 09:42
Last Modified:	01 Feb 2023 09:42
URI:	https://eprints.iisc.ac.in/id/eprint/79689

Actions (login required)

View Item