A ring-type magnetic head (H) is of a structure in which a metallic magnetic film (8) is sandwiched between two substrates (2), and the metallic magnetic film (8) has a saturation magnetic field not less than 50 A/m in all directions parallel to a film plane thereof. Where the metallic magnetic film (8) is a Co-containing magnetically soft film having a crystallization temperature Tx greater than the Curie temperature Tc, the metallic magnetic film (8) is subjected to a first heat treatment at a temperature not less than Tc and a second heat treatment at a temperature Ta of Tc-180 DEG C</=Ta</=Tc-30 DEG C in the absence of any applied magnetic field. Where the metallic magnetic film (8) is a Co-containing magnetically soft film having a crystallization temperature Tx less than the Curie temperature Tc, the metallic magnetic film (8) is subjected to a first heat treatment at a temperature not greater than Tx while a rotating magnetic field is being applied thereto and a second heat treatment at a temperature Ta of Tx-200 DEG C</=Ta</=Tx-50 DEG C in the absence of any applied magnetic field. <IMAGE>
申请公布号
DE69311779(D1)
申请公布日期
1997.07.31
申请号
DE1993611779
申请日期
1993.10.12
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., KADOMA, OSAKA, JP
