ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
High-resolution transmission electron micrographs, including high-resolution structure images, and x-ray powder diffraction patterns have been observed of oleic acid-coated colloidal particles of cobalt ferrite. Particles were prepared by grinding. Particle defect content, size distribution and aspect ratio, and crystallite size and lattice constant were determined. Particles are irregularly shaped of log normally distributed dimension peaking near 5 nm and with an average aspect ratio of 1.3. They appear to be single crystals with few volume defects. Their lattice constant (0.8393±0.0003 nm) is indistinguishable from that of the bulk material. This supports earlier assertions that the anomalous magnetic behavior of these particles originates at their surface or the ferrite-surfactant interface.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.340376
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