Journal article
Directed magnetic field induced assembly of high magnetic moment cobalt nanowires
Ceramic processing, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Nanyang Technological University4
A directed magnetic field induced assembly technique was employed to align two phase (h.c.p. + f.c.c.) cobalt nanoparticles in a mechanically robust long wire morphology. Co nanoparticles with an average size of 4.3 nm and saturation magnetization comparable to bulk cobalt were synthesized by borohydride reduction followed by size selection and magnetic field induced assembly.
The coercivity of these nanowires was higher than their nanoparticle counterpart due to shape anisotropy. The experimental coercivity values of the nanowires were lower than the predictions of the coherent rotation, fanning and curling models of coercivity due to the preponderance of superparamagnetic particles with zero coercivity.
| Language: | English |
|---|---|
| Publisher: | Springer-Verlag |
| Year: | 2010 |
| Pages: | 821-830 |
| Journal subtitle: | Materials Science and Processing |
| ISSN: | 14320630 and 09478396 |
| Types: | Journal article |
| DOI: | 10.1007/s00339-009-5537-z |
Borohydride Reduction Characterization and Evaluation of Materials Cobalt Nanoparticles Condensed Matter Physics Magnetization Reversal Nanotechnology Operating Procedures, Materials Treatment Optical and Electronic Materials Physics Superparamagnetic Particle Surface Enhance Raman Scattering Surfaces and Interfaces, Thin Films
