EFFECT OF COUPLING ON MAGNETIC-PROPERTIES OF UNIAXIAL ANISOTROPY NIFECO TAN/NIFECO SANDWICH THIN-FILMS/

The coercivity of the coupled NiFeCo thin films is a function of nicke l-iron-cobalt (NiFeCo) film thickness and tantalum nitride (TaN) inter mediate layer thickness. This can be attributed to the variation of en ergy and magnetization gradients of a domain wall. The magnetization g radient can be affected by a thickness-induced coupling effect associa ted with altering the exchange and magnetostatic interactions between the two NiFeCo films. Decreasing the exchange coupling and increasing the magnetostatic coupling between the coupled NiFeCo films tends to d ecrease the energy and magnetization gradients of domain walls and res ults in decreased coercivity.