Abstract
Small-angle neutron scattering with polarization analysis reveals that Fe3O4 nanoparticles with 90 Å diameters have ferrimagnetic moments significantly reduced from that of bulk Fe3O4 at 10 K, nominal saturation. Combined with previous results for an equivalent applied field at 200 K, a core-disordered shell picture of a spatially reduced ferrimagnetic core emerges, even well below the bulk blocking temperature. Zero-field cooling suggests that this magnetic morphology may be intrinsic to the nanoparticle, rather than field induced, at 10 K.
Repository Citation
Krycka, K.L., J.A. Borchers, R.A. Booth, et al. 2010. "Internal magnetic structure of magnetite nanoparticles at low temperature." Journal of Applied Physics 107: 09B525.
Publisher
AIP Publishing
Publication Date
1-1-2010
Publication Title
Journal of Applied Physics
Department
Physics and Astronomy
Document Type
Article
DOI
https://dx.doi.org/10.1063/1.3358049
Keywords
Magnetic nanoparticles, Polarized neutron scattering
Document Version
published
Language
English
Format
text
