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Determination of the single-ion anisotropy energy in a S = 5/2 kagome antiferromagnet using X-ray absorption spectroscopy by de Vries, M. A.; Johal, T. K.; Mirone, A.; Claydon, J. S.; Nilsen, G. J.; Ronnow, H. M.; van der Laan, G.; Harrison, A. is a scholarly article available to read on EtoBox.

What is Determination of the single-ion anisotropy energy in a S = 5/2 kagome antiferromagnet using X-ray absorption spectroscopy about?

We report x-ray absorption and x-ray linear dichroism measurements at the Fe L2,3 edges of the geometrically frustrated systems of potassium and hydronium iron jarosite. Comparison with simulated spectra, involving ligand-field multiplet calculations modelling the 3d-2p hybridization between the iron ion and the oxygen ligands, has yielded accurate estimates for the ligand metal-ion hybridization and the resulting single-ion crystal field anisotropy energy. Using this method we provide an experimentally verified scenario for the appearance of a single-ion anisotropy in this nominally high-spin 3d5 orbital singlet 6S system, which accounts for features of the spin-wave dispersion in the long-range ordered ground state of potassium iron jarosite.

Author

de Vries, M. A.; Johal, T. K.; Mirone, A.; Claydon, J. S.; Nilsen, G. J.; Ronnow, H. M.; van der Laan, G.; Harrison, A.

Published

2008

Language

EN