PURPOSE: To obtain an amorphous alloy film having high saturation magnetic flux density, excellent thermal stability and a magnetostriction constant of approximately zero and a magnetic head using said amorphous alloy film by forming a metallic foundation film between the Co group amorphous alloy film and a substrate.
CONSTITUTION: A metallic foundation film 2 is shaped between a Co group amorphous alloy film 3 mainly comprising Co and a substrate 1. It is preferable that the metallic foundation film 2 consists of either one kind of a metal or two kinds or more of alloys of Zr, Ta, W, Nb and Mo. It is desirable that the metallic foundation film is constituted of at least one kind of the metal or two kinds or more or alloys of additional elements except Co of a Co group amorphous alloy from the point of chemical stability in the amorphous film having chemical formula CoaZrbTc (T=Zr, Ta, W, Nb, Mo...). Zr having the highest amorphous forming capacity of the Co group alloy is the most preferable among them. It is desirable that the film thickness of the metallic foundation film ranges from 30 to 500.
SHIIKI KAZUO
SAITOU NORITOSHI
OTOMO MOICHI
KUMASAKA TAKAYUKI
