Amorphous and nanocrystalline magnetic cores allow smaller, lighter and more energy-efficient designs in many high frequency applications for invertors, adjustable speed drives and power supplies. Amorphous metals are produced by using special technology where molten metal is cast into thin solid ribbons. Due to the material having no crystalline magnetic anisotropy, amorphous magnetic metal has high permeability. When compared with conventional crystalline magnetic materials, amorphous magnetic cores have superior magnetic characteristics, such as lower core loss. These cores offer superior design alternatives when used as the core material.