Dynamics and correlations in magnetic colloidal systems studied by X-ray photon correlation spectroscopy

Authors
Lal, J Abernathy, D Auvray, L Diat, O Grubel, G
Citation
J. Lal et al., Dynamics and correlations in magnetic colloidal systems studied by X-ray photon correlation spectroscopy, EUR PHY J E, 4(3), 2001, pp. 263-271
Citations number
34
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
EUROPEAN PHYSICAL JOURNAL E
ISSN journal
12928941 → ACNP
Volume
4
Issue
3
Year of publication
2001
Pages
263 - 271
Database
ISI
SICI code
1292-8941(200103)4:3<263:DACIMC>2.0.ZU;2-6
Abstract
We have studied the static and dynamic behaviour of magnetic colloidal syst ems (ferrofluids) by Small-Angle X-ray Scattering (SAXS) and X-ray Photon C orrelation Spectroscopy (XPCS). The main features of the novel XPCS techniq ue will be illustrated by data taken on a model system, colloidal silica sp heres. We will then present the results obtained on an optically opaque sus pension of magnetic colloids (maghemite) in the wave vector range from 10(- 3) to 10(-2) A(-1). Translational diffusion in zero field and anisotropic d iffusion under external magnetic fields will be discussed.