| 摘要 |
Write characteristics and read characteristics can be improved at the same time by applying novel materials to ferromagnetic layers. In a magnetoresistive effect element having a pair of ferromagnetic layers being opposed to each other through an intermediate layer to cause a current to flow in the direction perpendicular to the film plane to obtain a magnetoresistive change, at least one of the ferromagnetic layers contains a ferromagnetic material containing Fe, Co and B. The ferromagnetic material should preferably contain Fe<SUB>a</SUB>Co<SUB>b</SUB>Ni<SUB>c</SUB>B<SUB>d </SUB>(in the chemical formula, a, b, c and d represent atomic %. 5<=a<=45, 35<=b<=85, 0<c<=35, 10<=d<=30. a+b+C+d=100).
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