Abstract
Magnetic properties of nanocomposite materials obtained by dispersing barium ferrite nanoparti-cles within polystyrene-butadiene-styrene block copolymer, in the temperature range, 300 to 500 K are reported. The temperature dependence of the magnetization at saturation, averaged uniaxial magnetocrystalline anisotropy, and coercive field of thick films are analyzed. A "matrix effect" was noticed within the glass transition range of the hard component (polystyrene) of the polymeric matrix. The reported modifications of the magnetic properties were assigned to the competition between the magnetic and mechanical reorientation of nanoparticles within the polymeric matrix. Such modifications were not observed in barium ferrite dispersed in cement.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3678-3683 |
| Number of pages | 6 |
| Journal | Journal of Nanoscience and Nanotechnology |
| Volume | 9 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2009 |
Keywords
- Block copolymer
- Coercive field
- Magnetic nanoparticles
- Magnetocrystalline anisotropy
- Matrix effect
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- Biomedical Engineering
- General Materials Science
- Condensed Matter Physics