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Copyright © 2012 Published by Elsevier B.V. All rights reserved.

NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Magnetism and Magnetic Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Magnetism and Magnetic Materials, (2012) and is available at http://dx.doi.org/10.1016/j.jmmm.2012.07.044 on the publisher’s website http://www.sciencedirect.com/

Abstract

The drive to create ever smaller magnetic memory devices has led to the development of new nanomagnetic domains on surfaces. This paper reports the development of nano-chromium magnetic domains obtained using electrodeposition on vertically aligned carbon nanofibers arrays. Attempts to achieve this using conventional aqueous solutions were unsuccessful even after thin nickel underlayers were applied. The use of a novel electrolyte, a deep eutectic solvent, made from choline chloride: chromium (III) chloride enabled highly conformal overcoatings of chromium on individual bare carbon nanotubes to be obtained. Very high aspect ratio metal microstructures could be obtained by this novel technology. Magnetic imaging of the coated nanoarrays showed there to be clear magnetic character to the coating when the thin coatings were applied but this disappeared when the deposits were thicker and more contiguous.

Disciplines

Nanoscience and Nanotechnology

Recommended Citation

Wright, A.C., Faulkner, M.K., Harris, R.C., Goddard, A., and Abbott, A.P. (2012) “Nanomagnetic domains of chromium deposited on vertically-aligned carbon nanotubes”. Journal of Magnetism and Magnetic Materials, 324, pp. 4170-4174 doi.org/10.1016/j.jmmm.2012.07.044 available online 28th July