AI-discovered magnetic material: MnFe4(CoB2)2 (performance score: 0.731) | Space group: 1 (resolved from structure) | Key properties: Tc: 566K, Ms: 0.11T, Cost: $10/kg, E_hull: 0.273eV/atom, Dynamically stable | Discovered in 5 AI iterations | High Curie temperature and magnetic density combined with low cost and dynamic stability demonstrate that MnFe4(CoB2)2 is a promising magnetic material candidate. The main bottleneck is its thermodynamic metastability, which could be addressed by exploring synthesis conditions, doping, or alloying to lower the energy above hull and improve phase stability.