Calculated magnetic X-ray circular dichroism of half-metal CrO2

Calculated magnetic X-ray circular dichroism of half-metal CrO2

In a non-polar geometry for non-cubic ferromagnetic materials, it is shown that the X-ray absorption dichroism spectrum is composed of a non-magnetic contribution (natural dichroism) emanating from the reduced crystal symmetry and a magnetic contribution from spin-orbit coupling and spin polarizatio...

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Veröffentlicht in:Europhysics letters 2009-07, Vol.87 (2), p.27004
Hauptverfasser: Baadji, N, Alouani, M, Dreyssé, H
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Alouani, M
Dreyssé, H
description In a non-polar geometry for non-cubic ferromagnetic materials, it is shown that the X-ray absorption dichroism spectrum is composed of a non-magnetic contribution (natural dichroism) emanating from the reduced crystal symmetry and a magnetic contribution from spin-orbit coupling and spin polarization. Their computation at the $L_{2, 3}$ edges of the half-metal CrO2 chromium site, illustrate the good agreement with experiment. This is found only when both dichroic contributions are taken into account. Moreover, X-ray magnetic dichroism sum rules can be applied directly to extract the spin and orbital magnetic moments only after removing the natural dichroism from the full spectrum.
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71.20.Eh
title Calculated magnetic X-ray circular dichroism of half-metal CrO2
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