| 摘要 |
PROBLEM TO BE SOLVED: To provide a switched connection film which is thermally stable and has large MR ratio, and a manufacturing method of a magnetoresistive effect element, a magnetoresistive effect head and a switched connection film. SOLUTION: A switched connection film 100 contains a ferromagnetic material layer 3 and a magnetization rotation restraining layer, which is arranged in the vicinity of the ferromagnetic material layer 3 in order to prevent magnetization rotation of the ferromagnetic material layer 3. The magnetization rotation restraining layer contains a (AB)2Ox layer 2, where O is oxygen atom and satisfies the condition 2.8<x<3.2, when ion radii of atom A, atom B and atom C are set as Ra, Rb and Ro, respectively, t which is defined by formula t=(Ra+ Ro)/(√2.(Ra+Ro)) satisfies the condition 0.8<t<0.97.
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