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The X-ray magnetic circular dichroism (XMCD) has been measured at the Co Kedge in Co-hcp and R-Co compounds (R=La, Tb, Dy). The structure of theexperimental XMCD spectra in the near-edge region has been observed to behighly sensitive to the magnetic environment of the absorbing site.Calculations of the XMCD have been carried out at the Co K edge in Co metal,LaCo$_5$ and TbCo$_5$ within the multiple-scattering framework including thespin-orbit coupling. In the three systems, the XMCD spectra in the near-edgeregion are well reproduced. The possibility to separate and quantitativelyestimate the local effects from those due to the neighboring atoms in the XMCDcross section makes possible a more physical understanding of the spectra. Thepresent results emphasize the major role played by the $d$ states of the Tbions in the XMCD spectrum at the Co K edge in the TbCo$_5$ compound.Comment: 34 pages, revtex, 10 eps figures included with epsf, after referee  revie

physical review. b, condensed matter

Rare-earth contributions to the x-ray magnetic circular dichroism at the Co<b><i>K</i></b>edge in rare-earth–cobalt compounds investigated by multiple-scattering calculations

Rare-earth contributions to the x-ray magnetic circular dichroism at the CoKedge in rare-earth–cobalt compounds investigated by multiple-scattering calculations