The spectroscopy of spinhyphen;dependent absorption using circularly polarized synchrotron radiation is a new method to study the magnetic structure of multicomponent systems. We demonstrate for substitutional 5dtransitionhyphen;metal impurities in an iron host that fromL2,3spinhyphen;dependent absorption signal information on the local magnetic moment, carried by thedelectrons of the absorbing atom, can be deduced. The experimentally determined local magnetic moments of the 5dimpurities in Fe are in good agreement with the theoretical results based on the spinhyphen;polarized relativistic Korringandash;Kohnndash;Rostokerndash;Green function method of bandhyphen;structure calculation. The presented data areminus;to our knowledgeminus;the first experimental proof of the change from antiferrohyphen; to ferromagnetic coupling between Os and Ir, which has been predicted by the abovehyphen;mentioned calculations.
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