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Dipolar Chains formed by synthesized cobalt nanocubes

Published

Author(s)

Guangjun Cheng, Robert D. Shull, Angela R. Hight Walker

Abstract

Cobalt nanocubes with an average edge length of 50 nm and the epsilon crystalline structure were synthesized via thermo-decomposition in 1,2-dichlorobenzene at 120 oC in the presence of the surfactants. These nanocubes form dipolar chains upon drying in zero applied field and three-dimensional chains along the applied magnetic field direction. The magnetic measurements reveal strong inter-particle couplings among the nanocubes in their dried magnetic-field induced assemblies. The constricted hysteresis loops and near-zero coercivity indicate the existence of vortex states in the assemblies. Exposure to electron beam heats up the nanocubes and turns the dipolar chains into nanowires.
Citation
Journal of Magnetism and Magnetic Materials
Volume
321
Issue
10

Keywords

cobalt, dipolar chains, magnetic nanoparticles, magnetic property, nanocubes

Citation

Cheng, G. , Shull, R. and Hight, A. (2009), Dipolar Chains formed by synthesized cobalt nanocubes, Journal of Magnetism and Magnetic Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=842508 (Accessed April 23, 2024)
Created May 11, 2009, Updated January 27, 2020