| Autor: |
Beetz, A., Gollwitzer, C., Richter, R., Rehberg, I. |
| Rok vydání: |
2008 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/0953-8984/20/20/204109 |
| Popis: |
We observe the dynamics of waves propagating on the surface of a ferrofluid under the influence of a spatially and temporarily modulated field. In particular, we excite plane waves by a travelling lamellar modulation of the magnetization. By this external driving both the wavelength and the propagation velocity of the waves can be controlled. The amplitude of the excited waves exhibits a resonance phenomenon similar to that of a forced harmonic oscillator. Its analysis reveals the dispersion relation of the free surface waves, from which the critical magnetic field for the onset of the Rosensweig instability can be extrapolated. |
| Databáze: |
arXiv |
| Externí odkaz: |
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