1) Erongba: Awọn oofa Samarium Cobalt (SmCo) jẹ ti Samarium, Cobalt ati Iron, awọn oofa aiye toje wọnyi lagbara pupọ fun iwọn kekere wọn, ti fadaka ni irisi ati ohun-ini ti ara sable.
2) Awọn abuda: Demagnetization giga resistance.
Awọn ohun-ini ti ara otutu ti o dara
Daradara resistance ti ipata