Tiny Pressure Alters Magnetism in Altermagnet Candidates

If researchers can identify and develop suitable materials, including altermagnets, the approach could support advances in wireless communication and quantum computing.

“By controlling the magnetic domains, we can directly influence the transport behavior, and that opens the door to exploring these materials for spintronic technologies,” said Pengcheng Dai of Rice University, a former neutron scientist at ORNL. His statement describes a route for control, not a demonstrated device. “Transport behavior” here refers to how electrons move through a material.

“What’s exciting is that one creative experimental idea — a small mechanical squeeze between two plates — can reveal entirely new magnetic behavior and push the field forward, and neutron scattering plays such a critical role, revealing the underlying change in magnetism,” said Feng Ye, an ORNL neutron scientist and co-author on both linked publications.

Ye’s wording, “push the field forward,” captures the authors’ view. It also marks the boundary: the neutron experiment reveals a controllable physical effect, while device performance and practical advantages remain untested.

What does the squeeze change for electronics?

The immediate change is a control method. Researchers can now treat strain as a tunable input that shifts magnetic-domain populations and changes an electrical response in candidate altermagnets. That could offer a straightforward route to controlling building blocks for future spintronic devices.

For buyers, programmers and quantum-computing users, it changes nothing yet. The laboratory account describes no assembled spintronic device, quantum-computing test, faster operation, lower power use or commercial schedule. The broader claims about faster, more energy-efficient electronics and new quantum-computing technologies remain possibilities, not measured results.

What remains unresolved?

The laboratory account calls the changes dramatic, yet it gives no numerical pressure, percentage change, sample count, uncertainty range, durability test or manufacturing test. It also does not establish that the same response survives beyond the tiny crystals, or that an altermagnet can outperform existing spintronic materials.

Those omissions do not erase the observed effect; they set the distance between laboratory physics and usable hardware.

The papers are linked, not independent confirmations by unrelated teams. The source calls them linked publications and lists overlapping authors, including Feng Ye and Pengcheng Dai. They test related strain effects in two materials, so counting them as two independent replications would overstate the evidence.

The account leaves open whether independent groups can reproduce the result and whether the effect survives device-level tests. Without that evidence, treating the strain-control method as a practical technology remains premature.

The two papers

• Advanced Materials: Weiliang Yao, Feng Ye, Zachary J. Morgan, Douglas L. Abernathy, Ruixian Liu, Sijie Xu, Yuxiang Gao, Kevin Allen, Yuan Fang, Emilia Morosan, Qimiao Si and Pengcheng Dai, “Uniaxial Strain Tuned Magnetism of the Altermagnet Candidate H‐FeS,” 2026; 38(56), DOI 10.1002/adma.74398.
• Physical Review X: Zhaoyu Liu, Sijie Xu, Jonathan M. DeStefano, Elliott Rosenberg, Tingjun Zhang, Jinyulin Li, Matthew B. Stone, Feng Ye, Wei Tian, Sarah Edwards, Rong Cong, Siyu Pan, Ching-Wu Chu, Liangzi Deng, Emilia Morosan, Rafael M. Fernandes, Jiun-Haw Chu and Pengcheng Dai, “Strain-Tunable Anomalous Hall Effect in Hexagonal MnTe,” 2026; 16(3), DOI 10.1103/589s-s1yy.