Two Room-Temperature Antiferromagnetic Semiconductor Candidates
Vals AI reports that a team of Claude Opus 5.5 agents found two candidate room-temperature antiferromagnetic semiconductors for computer memory, one newly designed and one first made in 1999.
Vals AI used a team of Claude Opus 5.5 agents to search for magnets that have zero net magnetism but still sort electrons by spin. Both candidates are predicted by calculation to have this property, and neither is reported as tested in a lab. Vals AI is sharing the full calculations, the code and a list of known caveats.
- Date
- Sunday, 4 October 2026
- Lab
- Vals AI
- Kind
- paper
- Access
- paper only
The results are computational predictions published by Vals AI, not Anthropic, and have not been experimentally confirmed. The page was truncated, so details and caveats were not fully read.
Sources
This record was checked against its sources on 6 October 2026. How we check