Magnetoresistive effect element, magnetic memory, and magnetoresistive effect element manufacturin

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According to one embodiment, a magnetoresistive effect element includes a first magnetic film having magnetic anisotropy and an invariable magnetization direction in a direction perpendicular to a film plane, a second magnetic film having magnetic anisotropy and a variable magnetization direction in the direction perpendicular to the film plane, and a nonmagnetic film between the first magnetic film and the second magnetic film. At least one of the first and second magnetic films includes a first magnetic layer. The first magnetic layer includes a rare earth metal, a transition metal, and boron.