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| Titel: |
Experimental evaluation of the magnetic properties of commercially available magnetic microspheres |
| Auteur: |
Joan Connolly Timothy G. St. Pierre Jon Dobson |
| Verschenen in: |
Bio-medical materials and engineering |
| Paginering: | Jaargang 15 (2005) nr. 6 pagina's 421-431 |
| Jaar: |
2005-11-22 |
| Inhoud: |
The magnetic properties of 5 commercially available magnetic microsphere samples are tested and compared with those stated by their manufacturers. A suspension of magnetic, iron oxide nanoparticles is studied for comparison. Two of the microsphere samples have magnetic properties which do not support the manufacturer's claims of superparamagnetism. The remaining 3 microsphere samples as well as the nanoparticle suspension are superparamagnetic or ferromagnetic as claimed by the manufacturers. Field cooled and zero field cooled magnetisations indicate that the non-superparamagnetic microsphere samples contain blocked magnetic particles at room temperature. This observation is supported by the open hysteresis loops of the room temperature, field dependent magnetisation measurement. There is a significant paramagnetic component in the superparamagnetic microspheres. This is also present to a lesser extent in a nanoparticle suspension. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 8 gevonden artikelen
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