Characterisation of DynabeadsRG by magnetization measurements and Mossbauer spectroscopy

Characterisation of DynabeadsRG by magnetization measurements and Mossbauer spectroscopy

X-ray diffraction, SEM analysis, Mossbauer spectroscopy and magnetic measurements were used to characterize three different magnetic beads (Dynabeads). Maghemite (gamma-Fe2O3) is the predominant crystalline phase. The nanoparticles were evenly spread in the beads, and the crystal sizes were in the r...

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Veröffentlicht in:Journal of magnetism and magnetic materials 2005-05, Vol.293 (1), p.41-47
Hauptverfasser: Fonnum, Geir, Johansson, Christer, Molteberg, Astrid, Morup, Steen, Aksnes, Elin
Format: Artikel
Sprache:eng
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Zusammenfassung:X-ray diffraction, SEM analysis, Mossbauer spectroscopy and magnetic measurements were used to characterize three different magnetic beads (Dynabeads). Maghemite (gamma-Fe2O3) is the predominant crystalline phase. The nanoparticles were evenly spread in the beads, and the crystal sizes were in the range of 8 nm. The nanoparticles showed superparamagnetic behaviour. The particle's intrinsic magnetization of about 340 kA/m is typical for nanoparticles of maghemite.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2005.01.041