The growth of localized states on the surface of magnetic fluids

✍ Scribed by Holger Knieling; Ingo Rehberg; Reinhard Richter

• Book ID: 103880956
• Publisher: Elsevier
• Year: 2010
• Tongue: English
• Weight: 540 KB
• Volume: 9
• Category: Article
• ISSN: 1875-3892
• DOI: 10.1016/j.phpro.2010.11.045

✦ Synopsis

By means of a local magnetic perturbation we generate localized states on the surface of a ferrofluid in the bistable regime of the Rosensweig instability. Establishing a magnetic ramp at the edge of the vessel enables us to record the growth of the localized spikes with a high speed camera. From the pictures we extract their growth rate. Under variation of the local induction we find a square-root scaling of the growth rate, which can be understood by a saddle-node bifurcation, induced by the local variation of the magnetic induction.