- GMR MAGNETIC SENSOR HAVING AN IMPROVED SENSITIVITY OF MAGNETIC DETECTION

摘要

The large magnetoresistive (GMR) magnetic sensor of the present invention comprises a bottom electrode, a first nonmagnetic metal layer formed on the bottom electrode and comprising ferromagnetic regions, and a second nonmagnetic metal layer on the first nonmagnetic metal layer; A third nonmagnetic metal layer formed on the second nonmagnetic metal layer and including ferromagnetic regions; An upper electrode is formed on the third nonmagnetic metal layer, and a tunneling insulating layer is further disposed between the first nonmagnetic metal layer and the third nonmagnetic metal layer.