Permanent magnet materials are provided. The permanent magnet materials are cerium based materials including zirconium and iron in combination with cobalt. The permanent magnet materials may have the formula Ce2ZrFe15−xCox wherein 6≤x≤15. In some embodiments, the permanent magnet materials have the formula Ce2+yZr1−yFe(15−x)(2−z)/2)CoxCu((15−x)z/2) wherein 6≤x≤15, 0≤y≤0.4, and z=0 or 1. In other embodiments, the permanent magnet materials have the formula Ce2Zrx(Fe1−yCoy)17−2x, where 0