STRONG MAGNETIC MULTIELECTRON EXCITATIONS AT THE L-EDGES IN RARE-EARTHS

In the magnetic or spin-dependent EXAFS (SPEXAFS), i.e. the magnetic c ounterpart to the conventional EXAFS, additional strong dispersive str uctures appear at the Gd, Tb and Ho L-edges within 200 eV above the ab sorption threshold. These features are interpreted as magnetic multi-e lectron excitations. While similar effects in the EXAFS-profiles are s eldom seen they are clearly visible in the dichroic signal due to thei r strong magnetic character. By the presented high accuracy of our SPE XAFS studies it is possible to separate these MMEE structures from the overlapping strong magnetic EXAFS for the first time and therefore ob tain new insight into the physical origin of these effects.