| 摘要 |
PROBLEM TO BE SOLVED: To precisely detect the direction of an outer magnetic field through the use of magnetic tunnel effect. SOLUTION: Lower electrodes 11 are installed on a substrate 10, and magnetic tunnel junction structure constituted of ferromagnetic films 12 and 13, insulating layers 14, ferromagnetic films 15 and dummy films 16 are formed on the lower electrodes 11. A fixed magnetization layer where the direction of magnetization is fixed is formed by the ferromagnetic films 12 and 13. A free magnetization layer changing the direction of magnetization by the ferromagnetic films 15 is constituted. The ferromagnetic films 15 are formed on rectangles and the direction of fixed magnetization by the ferromagnetic films 12 and 13 is set to be the short side direction of the ferromagnetic film 15.
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