Magnetic sensor

A magnetic sensor comprising:

• a magnetic field conversion unit;
• a magnetic field detection unit;
• and a magnetic film formed of a soft magnetic material, wherein
• the magnetic field conversion unit includes at least one yoke formed of a soft magnetic material,
• the at least one yoke is configured to receive an input magnetic field and generate an output magnetic field, the input magnetic field containing an input magnetic field component in a direction parallel to a first virtual straight line,
• the output magnetic field contains an output magnetic field component in a direction parallel to a second virtual straight line intersecting the first virtual straight line, the output magnetic field component varying depending on the input magnetic field component,
• the magnetic field detection unit includes at least one magnetic detection element,
• the at least one magnetic detection element is configured to receive the output magnetic field and generate a detection value corresponding to the output magnetic field component,
• the at least one yoke has a first end and a second end opposite to each other in the direction parallel to the first virtual straight line,
• the first end is located closer to the at least one magnetic detection element than is the second end,
• the at least one magnetic detection element has a third end and a fourth end opposite to each other in the direction parallel to the first virtual straight line,
• the fourth end is located closer to the at least one yoke than is the third end,
• assuming that there are a first virtual plane including the first end, intersecting the first virtual straight line and being parallel to the second virtual straight line, a second virtual plane including the fourth end and being parallel to the first virtual plane, and a third virtual plane including the third end and being parallel to the first virtual plane, the magnetic film is located on a side of the third virtual plane opposite from the first virtual plane,
• the at least one yoke has a width, the width being a dimension in the direction parallel to the second virtual straight line,
• the magnetic film has a thickness and a width, the thickness being a dimension in the direction parallel to the first virtual straight line, the width being a dimension in the direction parallel to the second virtual straight line,
• the thickness of the magnetic film is smaller than the width of the at least one yoke, and
• the width of the magnetic film is greater than the width of the at least one yoke.