Science · Long runs

90 agents found two room-temperature magnetic semiconductor candidates

In three days, more than 90 Claude Opus 5.5 agents run by Vals AI surfaced YBaMnFeO₅ and KV[Cr(CN)₆] in simulations as materials that sort electrons by spin while their magnetism cancels. The second was synthesized in 1999, its property unnoticed for 27 years.

Made with

Claude Opus 5.5

Posted

5 October 2026

Vals AI@ValsAI

For decades, researchers have sought materials that sort electrons by spin while their magnetism cancels.

In 3 days, 90+ Opus 5.5 agents helped us uncover two room-temperature magnetic semiconductor candidates in simulations: YBaMnFeO₅ and KV[Cr(CN)₆].

KV[Cr(CN)₆] was synthesized back in 1999. Its predicted ability to sort electrons by spin appears to have been hiding in plain sight for 27 years.

5 Oct 2026View on X