Magnetic sensing element with ESD resistance improved by adjusting the lengths of antiferromagnetic layers and free layer in the height direction

摘要

A magnetic sensing element having a reduced electrical resistance and a large exchange anisotropic magnetic field between a free layer and antiferromagnetic layers for exchange biasing is provided. The magnetic sensing element includes second antiferromagnetic layers and a free magnetic layer, and the length of the second antiferromagnetic layers in a height direction in side regions disposed at the lateral sides of a track width region is larger than the length of the free magnetic layer in the height direction in the track width region.