FINEMET® alloy is a nanocrystalline material obtained by heat treating an iron based amorphous alloy. Cores made from this alloy and heat treated to obtain square BH loops are useful as magnetic amplifiers in switch-mode power supplies. These cores have low coercive field and low core losses. The higher saturation induction of the alloy lends itself to small core size. This alloy is lead-free*.

FINEMET® square loop magnetic cores exhibit square dc hysteresis loop and high Bsat resulting in the following benefits:

• Low saturated permeability
• Low coercive field - indicating a small reset current
• Low loss - because of thin (18µm) ribbon
• Small size