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I. Reichl, R. Hammerling, A. Vernes, P. Weinberger, C. Sommers, L. Szunyogh:
"Ab initio determination of Kerr angles in Cu₄Ni₈Cu_nNi₉/Cu.100) (n=2-10)";
Physical Review B, 70 (2004), 214417-1 - 214417-6.

Calculated polar magneto-optic Kerr rotation and ellipticity angles are presented for the system
Cu4Ni8CunNi9/Cus100d, n=2, . . . , 10. Contrary to the common belief, the Kerr signals are found to be not
directly proportional to the total magnetic moment. It will be shown that in order to assign at least indirectly
the size (and sign) of the Kerr angles and therefore the type of coupling to a kind of total magnetic moment,
one has to consider weighted layer-resolved moments, e.g., weighted by the damping factors of the reflected
waves. As to be expected the occurring oscillations in the Kerr angles with respect to the spacer thickness
resemble closely those for the interlayer exchange coupling energy.
DOI: 10.1103/PhysRevB.70.214417 PACS number(s): 77.22.Ch, 78.20.Bh, 78.20.Ci, 78.20.Ls

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