MAGNETIC SENSOR

摘要

Disclosed is a low-cost magnetic sensor having high sensing accuracy, wherein the magnetization directions of fixed magnetic layers of a plurality of magnetoresistive effect elements can be controlled antiparallelly in a single chip configuration. Specifically, first magnetoresistive effect elements (13, 14) and second magnetoresistive effect elements (15, 16) are formed in the form of films on a same substrate. A fixed magnetic layer (42) of each of the first magnetoresistive effect elements (13, 14) has a laminated ferrimagnetic structure having three magnetic layers (49, 51, 53), and a fixed magnetic layer (55) of each of the second magnetoresistive effect elements (15, 16) has a laminated ferrimagnetic structure having two magnetic layers (56, 58). The magnetization direction of the respective third magnetic layers (53) of the first magnetoresistive effect elements (13, 14) and the magnetization direction of the respective second magnetic layers (58) of the second magnetoresistive effect element (15, 16) are antiparallel to each other.