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.
Physicists at the University at Buffalo have proposed a quantum sensing technique that could identify altermagnets using tiny defects in diamond. The method would help confirm the properties of these recently theorized materials. It was detailed in a paper published in Physical Review Letters.
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An international team has uncovered a complex network of topological electronic states inside cobalt that remain stable at room temperature. The finding challenges decades of assumptions about the well-studied metal and points to potential uses in spintronics and quantum technologies.
Physicists at the University of California, Santa Barbara, have developed entangled spin systems in diamond that exceed classical sensing limits using quantum squeezing. This breakthrough, led by Ania Jayich and featuring work by Lillian Hughes, enables more powerful and compact quantum sensors for real-world applications. The achievement is detailed in three recent scientific papers.
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Researchers at the University of Konstanz have developed a technique to alter the magnetic properties of materials using laser pulses, effectively transforming one material into another at room temperature. By exciting pairs of magnons in common haematite crystals, the method enables non-thermal control of magnetic states and potential data transmission at terahertz speeds. This breakthrough could allow quantum effects to be studied without extreme cooling.