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DY: Fachverband Dynamik und Statistische Physik

DY 48: Dynamics and Chaos in Many-Body Systems I (joint session DY/TT)

DY 48.2: Talk

Thursday, March 30, 2023, 15:15–15:30, MOL 213

Magnetic Dipole Clusters - Resurrection of Catastrophe Machines — •Ingo Rehberg and Simeon Völkel — Experimental Physics, University of Bayreuth

Hysteretic transitions between stable configurations of a hexagonal magnetic dipole cluster [1] are set in a broader context by revealing the nature of the corresponding instabilities [2]. Following the animation of this bifurcation scenario [3], we present an experimental setup where the height of the centre dipole serves as the bifurcation parameter. This catastrophe machine demonstrates the two instabilities forming the hysteresis loop, and it might provide a hint to the unresolved puzzle of the slowing down of one of the eigenmodes [4].
[1] Andrew D.P. Smith et al., JMMM 549, 168991 (2022).

[2] Simeon Völkel et al., JMMM 559, 169520 (2022).

[3] https://doi.org/10.5281/zenodo.6380539 (18.5.2022).

[4] Peter T. Haugen et al., Chaos 32, 063108 (2022).