Vi. Nikitenko et al., MAGNETOOPTICAL INDICATOR FILM STUDY OF THE MAGNETIZATION OF A SYMMETRICAL SPIN-VALVE, IEEE transactions on magnetics, 32(5), 1996, pp. 4639-4641
A magneto-optical indicator film (MOIF) technique is used for direct e
xperimental study of the magnetization reversal process in a symmetric
NiO/Co/Cu/NiFe/Cu/Co/NiO spin valve. It is shown for the first time t
hat the reversal of the free center layer proceeds by nonuniform magne
tization rotation. The observed switching mechanism is presumed to be
associated with the influence of the nonuniform magnetostatic field th
at follows from surface roughness and the polycrystalline structure of
the magnetic layers.