PROBLEM TO BE SOLVED: To provide a magnetic sensor and a magnetic sensor device with which it is possible to suppress the occurrence of a local diamagnetic field and suppress any increased noise.SOLUTION: A magnetic sensor according to the present embodiment comprises: a first magnetic layer extending in a first direction, with its length in the first direction being 10 times the length in a second direction orthogonal to the first direction or more a first member arranged on the first magnetic layer and extending in the first direction and including a nonmagnetic insulator a second member arranged on the first member and extending in the first direction and including a magnetic substance a third member arranged on the second member and extending in the first direction and including a nonmagnetic insulator a second magnetic layer arranged on the third member and extending in the first direction, with its length in the first direction being 10 times the length in the second direction or more a connection part for electrically connecting the first magnetic layer and the second magnetic layer and a circuit for sending a current between the first magnetic layer and the second magnetic layer.SELECTED DRAWING: Figure 34COPYRIGHT: (C)2017,JPO&INPIT【課題】局所的な反磁界の発生を抑制し、ノイズの増加を抑制することのできる磁気センサおよび磁気センサ装置を提供する。【解決手段】本実施形態による磁気センサは、第1方向に延在しかつ前記第1方向の長さが前記第1方向に直交する第2方向の長さの10倍以上である第1磁性層と、前記第1磁性層上に配置され、前記第1方向に延在しかつ非磁性絶縁体を含む第1部材と、前記第1部材上に配置され、前記第1方向に延在しかつ磁性体を含む第2部材と、前記第2部材上に配置され、前記第1方向に延在しかつ非磁性絶縁体を含む第3部材と、前記第3部材上に配置され、前記第1方向に延在しかつ前記第2方向の長さの10倍以上である第2磁性層と、前記第1磁性層と前記第2磁性層とを電気的に接続する接続部と、前記第1磁性層と前記第2磁性層との間に電流を流す回路と、を備えている。【選択図】図34
