Journal article · Conference paper
Dynamics in γ-Fe2O3 nanoparticles studied by time-of-flight polarized neutron scattering
In
Physica B: Condensed Matter
—
2004, Volume 350, Issue Suppl. 1, pp. E217-E219
Abstract
The inelastic neutron-scattering signal from magnetic nanoparticles contains information on magnetic dynamics like superparamagnetic relaxation and collective magnetic excitations. Often another, very broad quasi-elastic component is observed in addition. We have studied this quasi-elastic neutron signal from 4 nm ferrimagnetic maghemite (gamma-Fe(2)O(3)) particles, and by means of time-of-flight polarised neutron scattering we have identified the source of (most of) this signal to be water adsorbed at the surface of the nanoparticles.
A minor part of the signal has its origin in dynamics of disordered surface spins and vibrations of individual nanoparticles. (C) 2004 Elsevier B.V. All rights reserved.
| Language: | English |
|---|---|
| Year: | 2004 |
| Pages: | E217-E219 |
| Proceedings: | 3rd European Conference on Neutron Scattering |
| ISSN: | 18732135 and 09214526 |
| Types: | Journal article and Conference paper |
| DOI: | 10.1016/j.physb.2004.03.054 |
| ORCIDs: | Kuhn, L.T. and 0000-0003-4282-756X |
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