ferromagnetic alloy

例句：

1. 1. The magnetis made of a ferromagnetic material.
   这个磁铁是由铁磁性材料制成的。
2. 2.Ferromagnetic materials have unique properties that make them useful in many applications.
   铁磁性材料具有独特的性质，这使得它们在许多应用中非常有用。
3. 3. The discovery of this new ferromagnetic material has sparked interest in its potential applications.
   这种新型铁磁性材料的发现激发了对其潜在应用的兴趣。