Observation of x-ray magnetic circular dichroism at the Rh M_2,3 edge in Co-Rh alloys

The M2,3 edge of Rh in Co-Rh alloys shows measurable x-ray magnetic circular dichroism. Such dichroism is not present, however, for analogous alloys of Co-Ru. The induced Ru magnetic moment, if any, is thus demonstrated to be significantly smaller than the induced Rh moment in otherwise similar Co alloys.