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- Title
μSR study of the properties of Fe<sub>3</sub>O<sub>4</sub>-based nanostructured magnetic systems.
- Authors
Balasoiu, M.; Barsov, S.; Bica, D.; Vekas, L.; Vorob’ev, S.; Gritsaj, K.; Duginov, V.; Zhukov, V.; Komarov, E.; Koptev, V.; Kotov, S.; Mamedov, T.; Petrescu, C.; Shcherbakov, G.
- Abstract
A ferrofluid based on Fe3O4 nanoparticles dispersed in heavy water D2O is studied using the μSR method. The experiment has been carried out at temperatures 26–300 K. It is found that the diamagnetic (muon) fraction is formed in the ferrofluid in about the same amount as in D2O, but the muon-spin relaxation rate in the ferrofluid is much higher than in D2O. A significant shift of the muon-spin precession frequency in the ferrofluid is observed. It is shown that the shift of the muon precession frequency as a function of the external magnetic field is described by the Langevin function typical of paramagnetic magnetization. The mean magnetic field in the medium due to magnetic-nanoparticle polarization in an external field is experimentally determined. The nanoparticle sizes are estimated.
- Subjects
MAGNETIC fluids; NANOSTRUCTURES; PRECESSION; DEUTERIUM oxide; MAGNETIC fields
- Publication
JETP Letters, 2008, Vol 88, Issue 3, p210
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364008150149