NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
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.
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 October 9, 2025)