Spintronics
Researchers discover contactless magnetic friction
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Scientists at the University of Konstanz have identified a new type of sliding friction that occurs without physical contact, driven by magnetic interactions. This phenomenon breaks Amontons' law, a 300-year-old physics principle, by showing friction peaks at certain distances rather than increasing steadily with load. The findings appear in Nature Materials.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf have discovered previously unseen Floquet states inside extremely small magnetic vortices using minimal energy from magnetic waves. This finding, which challenges prior assumptions, could link electronics, spintronics, and quantum technologies. The results appear in Science.
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Scientists at the University of Basel and ETH Zurich have reversed the polarity of a specialized ferromagnet with a focused laser beam, without heating the material. This achievement, detailed in Nature, combines electron interactions, topology, and dynamical control in a single experiment. The method hints at future light-based electronic circuits on chips.