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Phys. Rev. Lett. 78, 1162 - 1165 (1997)

Branching Ratios of the Circular Dichroism at Rare Earth L23 Edges

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Michel van Veenendaal, J. B. Goedkoop, and B. T. Thole
European Synchrotron Radiation Facility, B.P. 220,F-38043 Grenoble Cédex, France

Received 3 July 1996

The branching ratios in the circular dichroism of the rare-earth L23 edges are explained in a model where the 5d band is empty in the ground state. In the final state the 5d radial wave function contracts not only by the 5d- 4f spin-spin interaction but by the complete exchange interaction. This explains the L3/L2 ratios, the relative magnitude of the quadrupole contribution, and the dispersive shape of the signal in ionic compounds.


©1997 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.78.1162
DOI: 10.1103/PhysRevLett.78.1162
PACS: 78.70.Ck, 61.10.Dp, 78.70.En

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