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  Controlling collective rotational patterns of magnetic rotors

Matsunaga, D., Hamilton, J. K., Meng, F., Bukin, N., Martin, E. L., Ogrin, F. Y., et al. (2019). Controlling collective rotational patterns of magnetic rotors. Nature Communications, 10(1): 4696. doi:10.1038/s41467-019-12665-w.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-F8B5-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-F8B6-7
Genre: Journal Article

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 Creators:
Matsunaga, Daiki, Author
Hamilton, Joshua K., Author
Meng, Fanlong1, Author              
Bukin, Nick, Author
Martin, Elizabeth L., Author
Ogrin, Feodor Y., Author
Yeomans, Julia M., Author
Golestanian, Ramin1, Author              
Affiliations:
1Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2570692              

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 Abstract: Magnetic actuation is widely used in engineering specific forms of controlled motion in microfluidic applications. A challenge, however, is how to extract different desired responses from different components in the system using the same external magnetic drive. Using experiments, simulations, and theoretical arguments, we present emergent rotational patterns in an array of identical magnetic rotors under an uniform, oscillating magnetic field. By changing the relative strength of the external field strength versus the dipolar interactions between the rotors, different collective modes are selected by the rotors. When the dipole interaction is dominant the rotors swing upwards or downwards in alternating stripes, reflecting the spin-ice symmetry of the static configuration. For larger spacings, when the external field dominates over the dipolar interactions, the rotors undergo full rotations, with different quarters of the array turning in different directions. Our work sheds light on how collective behaviour can be engineered in magnetic systems.

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Language(s): eng - English
 Dates: 2019-10-16
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/s41467-019-12665-w
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Title: Nature Communications
Source Genre: Journal
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Pages: 9 Volume / Issue: 10 (1) Sequence Number: 4696 Start / End Page: - Identifier: -