| 摘要 |
PROBLEM TO BE SOLVED: To provide a high output magnetoresistive effect element with good sensitivity for detecting magnetic field, and to provide a magnetic head, a magnetic storage, and a magnetic memory device employing it. SOLUTION: A GMR film 30 comprises an underlying layer 31, an antiferromagnetic layer 32, a fixed magnetization laminate 33, a nonmagnetic metal layer 37, a diffusion preventive layer 38, a free magnetization layer 39, and a protective layer 40 formed sequentially. The diffusion preventive layer 38 is composed of a ferromagnetic material containing at least one kind of elements selected from a group of Co, Fe and Ni but not containing Mn. The free magnetization layer 39 has a composition selected from region ABCDEFA in composition diagram of ternary system sequentially connecting point A(44, 23, 33), point B(48, 25, 27), point C(60, 20, 20), point D(65, 15, 20), point E(65, 10, 25) and point F(60, 10, 30) when the coordinate of each composition is represented as (Co content, Mn content, Al content). COPYRIGHT: (C)2007,JPO&INPIT
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