Thin film magnetic head having a magnetic/non-magnetic laminate structure with the non-magnetic material being a metal or an insulating nitride

In a thin film magnetic head comprising a magnetic core composed of upper and lower magnetic pole films spaced apart to define a read-write gap and a coil disposed between the upper and lower magnetic pole films in an area outside of the gap, the improvement wherein:

• said upper and lower magnetic pole films each comprise a thin-film laminate having alternating magnetic and non-magnetic thin films, said magnetic thin-film comprising an amorphous Co alloy having a soft magnetic property and a thickness within a range from 0.1 .mu.m to 0.5 .mu.m and said non-magnetic thin film comprising insulating nitride having a thickness within a range from 0.005 .mu.m to 0.05 .mu.m.

In a thin-film magnetic head comprising a magnetic core composed of upper and lower magnetic pole films spaced apart to define a read-write gap and a coil disposed between the upper and lower magnetic pole films in an area outside of the gap, the improvement wherein:

• said upper and lower magnetic pole films each comprise a thin-film laminate having alternating magnetic and non-magnetic thin films, said magnetic thin-film comprising an amorphous Co alloy having a soft magnetic property and a thickness within a range of 0.1 .mu.m to 0.5 .mu.m and said non-magnetic thin-film comprising a non-magnetic metal, wherein a ratio of a thickness of said non-magnetic thin film to a thickness of said magnetic thin film is within a range from 0.01 to 0.5.