New Discovery Reveals Dynamic Quasiparticles in Magnetic Mat

[patricjfrenn]

Researchers from the University of Missouri's College of Arts and Science have made a groundbreaking discovery at the nanoscale, revealing a new type of quasiparticle found in all magnetic materials, regardless of strength or temperature. This finding challenges previous understanding of magnetism, suggesting it is far more dynamic than once believed.

Deepak Singh and Carsten Ullrich, along with their teams of students and postdoctoral fellows, found that these quasiparticles exhibit behavior akin to bubbles in sparkling water — they can move freely and at incredibly fast speeds.

"This discovery could have a major impact on electronics, making them faster, smarter, and more energy-efficient," said Ullrich, Curators' Distinguished Professor of Physics and Astronomy. "But scientists must first explore how this new knowledge can be integrated into practical applications."

One promising area that stands to benefit from this discovery is spintronics, or "spin electronics." Unlike traditional electronics, which rely on the electrical charge of electrons to store and process information, spintronics takes advantage of the electron's natural spin. This quantum property allows for more efficient energy use, as the spin dissipates far less energy than the electron's charge.

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Singh, an associate professor specializing in spintronics, explained, "Instead of using the electron's charge, we utilize its rotational, or spinning, property. It's more efficient and results in less energy loss."

Singh’s team performed experiments to refine the properties of magnetic materials, while Ullrich’s team analyzed the results and developed models to explain the unusual behavior observed under intense spectrometer analysis at Oak Ridge National Laboratory.

This research builds on earlier work published in Nature Communications, where the team first observed this dynamic nanoscale behavior. Their recent study, Emergent Topological Quasiparticle Kinetics in Constricted Nanomagnets, published in Physical Review Research, further deepens the understanding of these newly discovered quasiparticles.

The study, supported by the U.S. Department of Energy Office of Science, Basic Energy Sciences, was co-authored by Jiason Guo, now a postdoctoral fellow at Oak Ridge National Laboratory, and Daniel Hill.