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Publication Citation: Dipolar Chains formed by synthesized cobalt nanocubes

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Author(s): Guangjun Cheng; Robert D. Shull; Angela R. Hight Walker;
Title: Dipolar Chains formed by synthesized cobalt nanocubes
Published: May 11, 2009
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
Pages: pp. 1351 - 1355
Keywords: cobalt; dipolar chains; magnetic nanoparticles; magnetic property; nanocubes
Research Areas: Biological Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (411KB)