Magneto-optical additivity in ferromagnetic bilayers separated by nonferromagnetic spacers (Article No. 033516)

Abstrakt

We show that for some ultrathin multilayer structures the proportionality of the longitudinal Kerr ellipticity signal to the magnetic film thickness does not take place. Instead, thinner magnetic layers give even twice larger contributions than the thicker ones located a few monolayers deeper.

This effect is demonstrated both experimentally and theoretically on ultrathin Fe/Cr/Fe sandwich systems prepared on GaAs(001) surfaces.