UNDERLAYER FOR REFERENCE LAYER OF POLYCRYSTALLINE CPP GMR SENSOR STACK

摘要

Embodiments disclosed herein generally relate to a magnetic head having an amorphous ferromagnetic reference layer. The ferromagnetic reference layer may have amorphous structure as a result of an amorphous ferromagnetic underlayer that the ferromagnetic reference layer is deposited thereon. The amorphous ferromagnetic reference layer enhances magnetoresistance, leading to an improved magnetic head.

主权项

1. A magnetic head, comprising:
a sensor stack, wherein the sensor stack includes: an antiferromagnetic layer; a first crystalline ferromagnetic underlayer; an amorphous ferromagnetic reference layer disposed over the crystalline ferromagnetic underlayer; a nonmagnetic layer disposed on the amorphous ferromagnetic reference layer; a second crystalline ferromagnetic underlayer disposed over the nonmagnetic layer; and a ferromagnetic free layer disposed on the second crystalline ferromagnetic underlayer.