
A NEW KIND OF ORDER
Magnetism makes room for a third act
A new experiment strengthens the case for altermagnetism.
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A team led by SLAC researchers has found a distinctive signature of altermagnetism, a magnetic phase proposed in 2022. In an October 29 report, the laboratory described experiments on manganese telluride using circularly polarized X-rays at the European Synchrotron Radiation Facility.
The measurements revealed a handed, or chiral, spin structure that the researchers say cannot occur in a conventional antiferromagnet. Experiments begun in 2024 and repeated in early 2025 helped establish the result, published in Science.
The appeal reaches beyond adding a new drawer to physics' filing cabinet. Altermagnets could offer useful properties for future electronics. That remains an application to explore, not a new device already on sale. For now, the good news is a sharper experimental picture of how matter can organize itself.
SLAC National Accelerator Laboratory ↗Source published October 29, 2026.


