Magnetic sensor device and magnetic sensor system

A magnetic sensor device comprising:

• at least one magnetic sensor configured to detect a target magnetic field that is a magnetic field to be detected, the at least one magnetic sensor including a plurality of magnetoresistive elements and an element layout area for laying out the plurality of magnetoresistive elements;
• and
• a support that supports the at least one magnetic sensor and has a reference plane, wherein:
• when the magnetic sensor device is seen in a first reference direction, a center of gravity of the element layout area is deviated from a center of gravity of the reference plane, the first reference direction being a direction perpendicular to the reference plane;
• the at least one magnetic sensor further includes
• a first resistor section and a second resistor section connected in series in a first path that is a path electrically connecting a first connection point and a second connection point, and
• a third resistor section and a fourth resistor section connected in series in a second path that is a path electrically connecting the first connection point and the second connection point;
• the first and fourth resistor sections are connected to the first connection point;
• the second and third resistor sections are connected to the second connection point;
• the plurality of magnetoresistive elements constitute the first to fourth resistor sections;
• each of the plurality of magnetoresistive elements includes a magnetization pinned layer having magnetization whose direction is fixed, a free layer having magnetization whose direction is variable depending on the target magnetic field, and a gap layer located between the magnetization pinned layer and the free layer;
• the magnetization of the magnetization pinned layer in each of the first and third resistor sections includes a component in a first magnetization direction, the first magnetization direction being a direction intersecting the first reference direction;
• the magnetization of the magnetization pinned layer in each of the second and fourth resistor sections includes a component in a second magnetization direction, the second magnetization direction being a direction intersecting the first reference direction and opposite to the first magnetization direction;
• the magnetization of the free layer in each of two of the first to fourth resistor sections includes a component in a third magnetization direction when the target magnetic field is not applied to the at least one magnetic sensor, the third magnetization direction being a direction intersecting the first reference direction and orthogonal to the first magnetization direction;
• and
• the magnetization of the free layer in each of the other two of the first to fourth resistor sections includes a component in a fourth magnetization direction when the target magnetic field is not applied to the at least one magnetic sensor, the fourth magnetization direction being a direction intersecting the first reference direction and opposite to the third magnetization direction.