A multilayer film is placed on a subatrate. The multilayer film includes
an antiferromagnetic layer, a pinned magnetic layer, a non-magnetic
material layer, and a free magnetic layer. The multilayer film has
recessed sections arranged in both side regions thereof, the recessed
sections being formed by partly removing the multilayer film in a vacuum.
The bottoms of the recessed sections are located between the upper face
and lower face of the antiferromagnetic layer. Amorphous barrier layers
with a thickness of .ANG. are placed on the bottoms of the recessed
sections, the amorphous barrier layers being formed in the same vacuum as
that for forming the recessed sections sequentially to the step of
forming the recessed sections.