Title :
Perpendicular magnetic anisotropy and coercivity of Co/Ni multilayers
Author :
den Broeder, F.J.A. ; Janssen, E. ; Hoving, W. ; Zeper, W.B.
Author_Institution :
Philips Res., Eindhoven, Netherlands
fDate :
9/1/1992 12:00:00 AM
Abstract :
The anisotropy of vapor-deposited Co/Ni multilayers has been studied as a function of Co and Ni layer thickness. Following a recent theoretical prediction, a strong perpendicular anisotropy was found for a [111] Co1/Ni2 multilayer. It is caused by interface anisotropy with Ks=0.31 mJ/m2 and is favored by internal stresses. The anisotropy constant K, which could reach a value of 680 kJ/m3, was found to depend sensitively on various deposition details. Depending on the total multilayer thickness, hysteresis loops could show full remanence with a coercivity which could be varied from 40 up to 170 kA/m
Keywords :
cobalt; coercive force; magnetic anisotropy; magnetic hysteresis; magnetic multilayers; magnetic thin films; nickel; vacuum deposited coatings; Co-Ni multilayers; [111] Co1/Ni2 multilayer; anisotropy constant; coercivity; deposition conditions; hysteresis loops; interface anisotropy; internal stresses; layer thickness; perpendicular anisotropy; perpendicular magnetic anisotropy; remanence; theoretical prediction; total multilayer thickness; Anisotropic magnetoresistance; Atomic layer deposition; Coercive force; Gold; Magnetic multilayers; Multilevel systems; Nonhomogeneous media; Perpendicular magnetic anisotropy; Substrates; X-ray scattering;
Journal_Title :
Magnetics, IEEE Transactions on
