Synthesis and characterization of Co–Ni and Fe–Ni alloy nanoparticles

V. Solanki (1) , O.I. Lebedev (2, 3) , M.M. Seikh (4) , N.K. Mahato (1) , B. Raveau (2) , A.K. Kundu (1)

1 IIITDM - Indian Institute of Information Technology, Design and Manufacturing [Kancheepuram]
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
3 ITMO University [Russia]
4 Visva Bharati University

The magnetic alloy nanoparticles have been synthesized by sol-gel method with a stable Pm-3m cubic structure. The Co–Ni and Fe–Ni alloy nanoparticles are highly crystalline and exhibit preferential low index <111> faceting as determined from HRTEM investigation. TEM images and EDX elemental mapping also confirm the nano-dimensional structure with core-shell structure, where the alloy forms the core and the shell is formed by amorphous carbon. The magnetization results of the alloy nanoparticles confirm the ferromagnetic nature at room temperature akin to their bulk metals with a significant value of field dependent isothermal magnetization at high temperature (390 K). © 2016 Elsevier B.V.

Keywords: Electron microscopy; Ferromagnetic; Nanostructures; Sol–gel synthesis

Domains: Chemical Sciences; Chemical Sciences; Cristallography; Chemical Sciences; Theoretical and/or physical chemistry; Chemical Sciences; Material chemistry

V. Solanki, O.I. Lebedev, M.M. Seikh, N.K. Mahato, B. Raveau, et al.. Synthesis and characterization of Co–Ni and Fe–Ni alloy nanoparticles. Journal of Magnetism and Magnetic Materials, 2016, 420, pp.39-44. ⟨10.1016/j.jmmm.2016.06.087⟩. ⟨hal-02184782⟩