| Issue |
EPL
Volume 78, Number 4, May 2007
|
|
|---|---|---|
| Article Number | 44003 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/78/44003 | |
| Published online | 07 May 2007 | |
Measuring the anomalous dispersion branch of surface waves on ferrofluids
1
Institut für Physikalische Chemie, Universität des Saarlandes - Postfach 15 11 50, D-66041, Saarbrücken, Germany
2
Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institut - CH - 5232 Villigen-PSI, Switzerland
3
Institut für Experimentalphysik, Universität des Saarlandes - Postfach 15 11 50, D-66041, Saarbrücken, Germany
4
Fachrichtung Technische Physik, Universität des Saarlandes - Postfach 15 11 50, D-66041, Saarbrücken, Germany
5
Institut für Theoretische Physik, Universität des Saarlandes - Postfach 15 11 50, D-66041, Saarbrücken, Germany
Received:
19
December
2006
Accepted:
3
April
2007
In this paper we report on the first experimental investigation of the anomalous dispersion branch of surface waves on ferrofluids in a magnetic field. The existence of such an anomalous dispersion branch has been predicted by several authors, but there has been no experimental evidence for its existence. In our experiments we used the well-known Faraday instability of parametrically excited surface waves on a ferrofluid in the presence of a magnetic field oriented perpendicular to the fluid's surface.
PACS: 47.50.Gj – Instabilities / 75.50.Mm – Magnetic liquids / 47.57.-s – Complex fluids and colloidal systems
© Europhysics Letters Association, 2007
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