Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834367 | Journal of Magnetism and Magnetic Materials | 2005 | 4 Pages |
Abstract
Magnetic resonance of a surfacted magnetite-based magnetic fluid was investigated in a temperature range from 100 to 300Â K. The magnetic resonance spectra were discussed in terms of contributions due to magnetic centers from isolated nanoparticles and dimers. The magnetic resonance data showed two distinct transitions. One due to a solid-liquid transition around 180Â K for the colloid liquid carrier, whereas the second one near 240Â K was attributed to phase separation. The spectra area analysis strongly supports our conclusions and additionally suggests the formation of agglomerates prior to the phase separation.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
K. Skeff Neto, A.F. Bakuzis, G.R.R. Gonçalves, F. Pelegrini, P.C. Morais,