Magnetization reversal features of Fe₁₅Co₂₀Ni₆₅ sandwiches with various anisotropy of layers

Abstract
Magnetization reversal process in Fe₁₅Co₂₀Ni₆₅/Cr or Cu/Fe₁₅Co₂₀Ni₆₅ sandwiches having magnetic layers with mutually perpendicular easy magnetization axes or different value of coercive force has been studied. Dependences of hysteresis properties on interlayer thickness (L_int) for the sandwiches were measured and coupling constants for different L_int were calculated also. On the basic of these data it is found that in the sandwiches for L_int <10 Å the exchange interlayer coupling dominates and for 10<L_int<50 Å the magnetostatic coupling is prevalent. The magnetostatic coupling may be realised through interface roughness (orange rind) and magnetization ripple.