October 29, 2026 — SLAC researchers have experimentally confirmed altermagnetism, a third magnetic phase beyond ferromagnetism and antiferromagnetism, as reported in Science. Lead author Daniel Jost presented direct evidence of chirality in manganese telluride (Mn Te), an altermagnetic material exhibiting asymmetric spin structures. This discovery validates theoretical predictions from 2022 and opens pathways for advanced electronics, quantum technologies, memory devices, and data centers.
For decades, physics recognized only two magnetism types: ferromagnetism (spins aligned uniformly) and antiferromagnetism (spins canceling out). Altermagnets bridge both, with alternating spin polarization that enables unique spin current manipulation without net magnetization. The team’s experiments on Mn Te revealed definitive chirality — an asymmetric spin arrangement resembling a spiral staircase — impossible to explain under traditional models.
These findings provide robust experimental proof of altermagnetism’s existence, fulfilling a long-sought scientific goal. Applications span quantum computing, high-density memory, and energy-efficient data processing, leveraging the material’s dual magnetic properties. As research expands, altermagnets may revolutionize spintronics and next-generation computing architectures by enabling unprecedented control over magnetic states.
Source: Hacker News · Summarized by HeadlinesBriefing