| Issue |
EPL
Volume 87, Number 2, July 2009
|
|
|---|---|---|
| Article Number | 27004 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/87/27004 | |
| Published online | 29 July 2009 | |
Calculated magnetic X-ray circular dichroism of half-metal CrO2
1
Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-ULP 23 rue du Loess, 67034 Strasbourg, France, EU
2
School of Physics and CRANN, Trinity College - Dublin 2, Ireland, EU
Received:
27
February
2009
Accepted:
2
July
2009
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 
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.
PACS: 71.15.Ap – Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.) / 71.20.-b – Electron density of states and band structure of crystalline solids / 71.20.Eh – Rare earth metals and alloys
© EPLA, 2009
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