期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 500, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2020.166404
关键词
Swarms; Hematite cubes; Magnetic particles; Rotating field
资金
- PostDocLatvia Grant [1.1.1.2/VIAA/1/16/018, 1.1.1.2/VIAA/1/16/197]
- M.era-net project FMF [1.1.1.5./ERANET/18/04]
- French-Latvian bilateral program Osmose project FluMaMi [40033SJ, LV-FR/2019/5]
Energy input by under-field rotation of particles drives the systems to emergent non-equilibrium states. Here we investigate the suspension of rotating magnetic cubes. Micron-sized hematite cubes are synthesized and observed microscopically. When exposed to a rotating magnetic field, they form rotating swarms that interact with each other like liquid droplets. We describe the swarming behaviour and its limits and characterize the swarm size and angular velocity dependence on the magnetic field strength and frequency. A quantitative agreement with a theoretical model is found for the angular velocity of swarms as a function of the field frequency.
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