Complex sentence: Some brands of alnico are isotropic and can be efficiently magnetized in any direction, but the stronger types such as alnico 5 and alnico 8 are anisotropic, with each having a preferred direction of magnetization, or orientation.
Split into simpler sentences: Some brands of alnico are isotropic and can be efficiently magnetized in any direction. Other types, such as alnico 5 and alnico 8, are anisotropic, with each having a preferred direction of magnetization, or orientation.