L Urutonde 2:17 rukuruzi ya samarium cobalt ikoreshwa cyane mu ndege, mu nyanja, mu buvuzi, mu modoka no mu zindi nganda bitewe n’ubushyuhe buke bwa magneti.Br na BH (Max) ya L Urwego ruhinduka gato hamwe no kuzamuka kwubushyuhe.Kugeza ubu, dushobora kubyara L22 magneti mubikorwa bihamye kandi binini hamwe na Br≥9.5kGs, α (20-60 ℃) muri 100ppm.