Systematics of the induced magnetic moments in 5d layers and the violationof the third Hund's rule - art. no. 207202

X-ray magnetic circular dichroism measurements are reported at the beginnin g (W) and at the end (Ir, Pt) of the 5d series of the periodic table. Consi derable induced magnetic moments of about 0.2 mu (B)/atom were probed for t he nonmagnetic W and It and compared to previous data for the Pt induced mo ments in multilayers. W was found to couple antiferromagnetically and Ir fe rromagnetically to the 3d layers. Finally, the W spin and orbital magnetic moment couple in parallel, contrary to what is expected from the third Hund 's rule. This remark-able finding shows that the induced magnetic behavior of 5d layers may be radically different than that of impurities and alloys.