| 摘要 |
PROBLEM TO BE SOLVED: To stabilize a resistance value of a reference magnetoresistive effect element and facilitate the control of a zero point output in a magnetic field detector for detection, thereby suppressing a detection error.SOLUTION: A magnetic field detector comprises: two or more detection elements 101, 102; two or more reference elements 111, 112; and a magnetic field applying wire 151 for applying bias magnetic fields to magnetization easy axis directions of free layers of the reference elements 111, 112. The reference elements and the detection elements have structures that laminate fixed layers where magnetization directions are fixed and free layers where magnetization directions changes in accordance with external magnetic fields. The reference elements 111, 112 includes: a state that the magnetization directions of the fixed layers and the magnetization directions of the free layers in non-magnetic fields are in parallel with each other; and a state that they are in anti-parallel with each other. The directions of bias magnetic fields applied to the state that they are in parallel with each other differs by 180° from that of bias magnetic fields applied to the state that they are in anti-parallel with each other. The detection elements 101, 102 have the magnetization directions of the fixed layers and the magnetization directions of the free layers in non-magnetic fields that are different from each other. |
